Luggage case convenient to turn

Abstract

The utility model discloses a luggage case convenient to steer, and belongs to the technical field of luggage cases, the luggage case comprises a case body, the luggage case further comprises a rolling assembly arranged at the bottom of the case body, the rolling assembly comprises a rolling ball mechanism, the rolling ball mechanism comprises a connecting arm arranged at the bottom of the case body, and an assembling groove is formed in the connecting arm; the first steel balls are arranged in the assembling groove and are not less than three; the second steel ball is larger than the first steel ball in size, extends into the assembling groove and is in rolling fit with the first steel ball; the housing is arranged on the connecting arm, and a limiting hole is formed in the housing; the second steel ball partially extends out of the limiting hole and is in rolling fit with the inner wall of the limiting hole. The rolling ball mechanism is used for replacing or partially replacing the universal rolling wheel, the second steel ball in the rolling ball mechanism is in rolling fit with the housing and the first steel ball, the part, extending out of the limiting hole, of the second steel ball can make rolling contact with the ground, any steering can be achieved, steering is flexible, and clamping cannot happen.

Description

Technical Field

[0001] This application relates to the field of luggage technology, specifically to a suitcase that is easy to turn. Background Technology

[0002] A suitcase is a portable container used for carrying belongings while traveling. It typically features a retractable handle and wheels for easy movement. Most suitcases on the market today have four sets of self-locking swivel wheels at the bottom for quick maneuvering. While these wheels allow for free rotation, they can be less flexible in practice when pushing or pulling the handle, especially with larger suitcases or heavier items, making them prone to jamming during maneuvers. Summary of the Invention

[0003] This application aims to address one of the technical problems in the related art to a certain extent. To this end, this application provides a luggage box that is easy to turn.

[0004] To achieve the above objectives, this application adopts the following technical solution: a luggage suitcase that is easy to turn, the luggage suitcase including a suitcase body, the luggage suitcase further including a rolling assembly disposed at the bottom of the suitcase body, the rolling assembly including a ball mechanism, the ball mechanism including:

[0005] A connecting arm is disposed at the bottom of the housing, and the connecting arm forms an assembly groove;

[0006] The first steel ball is disposed in the assembly slot and there are no fewer than three of them;

[0007] A second steel ball, larger in volume than the first steel ball, extends into the assembly groove and rolls in engagement with the first steel ball; and

[0008] A housing is disposed on the connecting arm and forms a limiting hole;

[0009] The second steel ball extends out from the limiting hole and rolls against the inner wall of the limiting hole.

[0010] The application of this invention has the following beneficial effects: The inventor discovered through research that the reason existing universal casters lack sufficient steering flexibility is due to their structure. Existing universal casters generally include a connecting frame and a roller mounted on the connecting frame. A pivot is formed on the connecting frame, and the universal caster rotates and inserts into a pivot hole at the bottom of the suitcase via the pivot. Thus, the rotation of the roller is achieved through the cooperation between the pivot and the pivot hole. However, the weight of the suitcase exerts pressure on the end of the pivot through the bottom wall of the pivot hole, creating significant friction between the bottom wall of the pivot hole and the pivot. This results in the universal caster lacking steering flexibility, and the heavier the suitcase, the more pronounced this problem becomes. Even with a bearing structure between the pivot and the rotating inner wall, the problem cannot be completely avoided. This application uses a ball bearing mechanism to replace or partially replace the universal caster. In this ball bearing mechanism, a second steel ball extends out of a limiting hole on the housing. The second steel ball rolls in cooperation with both the housing and the first steel ball. The portion of the second steel ball extending out of the limiting hole can roll in contact with the ground, allowing for arbitrary and flexible steering without jamming.

[0011] Optionally, multiple first steel balls are arranged around the second steel ball and symmetrically relative to the second steel ball. In this way, the multiple first steel balls can provide stable support for the second steel ball and prevent the second steel ball from becoming skewed.

[0012] Optionally, any two adjacent first steel balls can be in contact with each other and roll in a cooperative manner. In this way, the multiple first steel balls can restrain each other, preventing the first steel balls from failing to maintain symmetry with respect to the second steel balls.

[0013] Optionally, the assembly groove is a cylindrical groove, and the first steel ball rolls into contact with the bottom wall and side wall of the assembly groove. Designing the assembly groove as a cylindrical groove ensures that the centers of all the first steel balls are located on the same plane.

[0014] Optionally, the bottom and side walls of the assembly groove are provided with spherical cap-shaped positioning grooves, and each of the first steel balls rolls into the corresponding positioning groove. After the positioning grooves are provided, the first steel ball can roll into contact with the small surface area of ​​the positioning groove on the inner wall of the assembly groove, which can limit the circumferential displacement of the first steel ball and reduce the friction between the first steel ball and the second steel ball.

[0015] Optionally, the housing is detachably mounted on the connecting arm. This facilitates the assembly of the first and second steel balls.

[0016] Optionally, the rolling assembly further includes a roller mechanism, which includes self-locking rollers. The rolling assembly includes both the ball mechanism provided in this application and the roller mechanism used in the prior art. When the user wants to keep the box stable, the roller mechanism can achieve rapid self-locking. When it is necessary to change direction during the pushing and pulling of the box, the ball mechanism can quickly change direction.

[0017] Optionally, the suitcase includes a first half-shell and a second half-shell that can be opened and closed relative to each other. The suitcase also includes a pull rod disposed on the first half-shell. Two sets of roller mechanisms and two sets of ball mechanisms are provided, with both sets of roller mechanisms located at the bottom of the first half-shell and both sets of ball mechanisms located at the bottom of the second half-shell. When the user needs to tilt and drag the suitcase, the roller mechanisms on the first half-shell can contact the ground to roll, while the two sets of ball mechanisms are separated from the ground.

[0018] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0019] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0020] Figure 1 A schematic diagram of a conveniently steered suitcase provided in an embodiment of this application;

[0021] Figure 2 A structural diagram of a suitcase from another perspective;

[0022] Figure 3 This is a schematic diagram of the external structure of the ball rolling mechanism;

[0023] Figure 4 For the explosion of the rolling ball mechanism Figure 1 ;

[0024] Figure 5 For the explosion of the rolling ball mechanism Figure 2 .

[0025] The components include: 1. housing; 10. first half-shell; 11. second half-shell; 2. connecting arm; 20. assembly slot; 3. first steel ball; 4. second steel ball; 5. cover; 50. limiting hole; 6. self-locking roller; 7. pull rod. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Through research, the inventor of this utility model discovered that the reason existing omnidirectional casters lack steering flexibility is due to their structure. Existing omnidirectional casters generally include a connecting frame and a roller mounted on the connecting frame. A pivot is formed on the connecting frame, and the omnidirectional roller rotates into a pivot hole at the bottom of the suitcase via the pivot. Thus, the roller's direction is changed through the interaction of the pivot and the pivot hole. However, the weight of the suitcase exerts pressure on the end of the pivot through the bottom wall of the pivot hole, creating significant friction between the bottom wall of the pivot hole and the pivot. This results in the omnidirectional caster's lack of steering flexibility, and the heavier the suitcase, the more pronounced this problem becomes. Even with a bearing structure between the pivot and the inner wall of the pivot, the problem cannot be completely avoided. To solve this problem, this embodiment provides a suitcase with convenient steering.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the suitcase includes a body 1 and a rolling assembly, with the rolling assembly located at the bottom of the body 1. It is easy to understand that the body 1 contacts the ground via the rolling assembly and rolls through it. The rolling assembly includes a ball mechanism, which comprises a connecting arm 2, a first steel ball 3, a second steel ball 4, and a cover 5. The connecting arm 2 is located at the bottom of the body 1 and forms an assembly groove 20. In this embodiment, nine first steel balls 3 are provided, all of which are disposed within the assembly groove 20. The second steel balls 4 are larger in volume than the first steel balls 3, extend into the assembly groove 20, and roll in cooperation with the first steel balls 3. The cover 5 is located on the connecting arm 2 and forms a limiting hole 50. The second steel balls 4 partially extend from the limiting hole 50 and roll in cooperation with the inner wall of the limiting hole 50.

[0032] This application uses a ball rolling mechanism to replace or partially replace the universal roller. The second steel ball 4 in the ball rolling mechanism extends out of the limiting hole 50 on the cover 5. The second steel ball 4 rolls with the cover 5 and the first steel ball 3. The part of the second steel ball 4 extending out of the limiting hole 50 can roll and contact the ground. It can turn arbitrarily and flexibly without jamming.

[0033] It should be noted that in this embodiment, nine first steel balls are provided. In other optional embodiments, the number of first steel balls can also be three or more. Furthermore, the multiple first steel balls 3 are arranged around the second steel ball 4 and are symmetrical relative to the second steel ball 4. This allows the multiple first steel balls 3 to provide stable support for the second steel ball 4, preventing the second steel ball 4 from becoming skewed. Even further, in this embodiment, any two adjacent first steel balls 3 are in contact with each other and roll in cooperation. This allows the multiple first steel balls 3 to mutually restrain each other, preventing the first steel balls 3 from failing to maintain symmetry relative to the second steel ball 4.

[0034] like Figure 5 As shown, in this embodiment, the assembly groove 20 is a cylindrical groove, and the first steel ball 3 rolls into contact with the bottom wall and side wall of the assembly groove 20 respectively. Designing the assembly groove 20 as a cylindrical groove ensures that the centers of all the first steel balls 3 are located on the same plane.

[0035] In other alternative embodiments, positioning grooves (not shown in the figure) can be machined on the bottom and side walls of the assembly groove 20. These positioning grooves are spherical cap-shaped, allowing the first steel ball 3 to partially conform to the inner wall of the positioning groove. Each first steel ball 3 corresponds to a positioning groove in a rolling engagement. The term "correspondingly" here specifically means that the number of positioning grooves on the bottom wall of the assembly groove 20 is the same as the number of first steel balls 3, and the number of positioning grooves on the side walls of the assembly groove 20 is also the same as the number of first steel balls 3. One first steel ball 3 corresponds to one positioning groove on the bottom wall and one positioning groove on the side wall. With the positioning grooves provided, the first steel ball 3 can roll in contact with the small surface area of ​​the positioning groove on the inner wall of the assembly groove 20, limiting the circumferential displacement of the first steel ball 3 and reducing friction between the first steel ball 3 and the second steel ball 4.

[0036] In this embodiment, the cover 5 is detachably mounted on the connecting arm 2. This facilitates the assembly of the first steel ball 3 and the second steel ball 4. It is readily understood that the inner wall of the limiting hole 50 on the cover 5 has a curved surface that can slide and engage with the spherical surface of the second steel ball 4. In this embodiment, the cover 5 is fixed to the connecting arm 2 by adhesive bonding. In other alternative embodiments, screws can also be used to lock and fix the cover 5 to the connecting arm 2.

[0037] In this embodiment, the first steel ball 3 and the second steel ball 4 are both stainless steel balls. Of course, carbon steel balls, alloy steel balls, etc. can also be selected as the first steel ball 3 and the second steel ball 4.

[0038] like Figure 1 and Figure 2 As shown, the rolling assembly in this embodiment also includes a roller mechanism, which includes a self-locking roller 6. The self-locking roller 6 is an existing structure and can be directly purchased and installed on the bottom of the housing 1. The rolling assembly includes both the ball mechanism provided in this embodiment and the roller mechanism used in the prior art. When the user wants to keep the housing 1 stable, the roller mechanism can achieve rapid self-locking. When it is necessary to change direction during the pushing and pulling of the housing 1, the ball mechanism can quickly change direction.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the suitcase body 1 includes a first half-shell 10 and a second half-shell 11 that can be opened and closed relative to each other. Optionally, the first half-shell 10 and the second half-shell 11 can be opened and closed relative to each other via a zipper. The suitcase also includes a pull rod 7 disposed on the first half-shell 10. There are two sets of roller mechanisms and two sets of ball mechanisms. Both sets of roller mechanisms are disposed at the bottom of the first half-shell 10, and both sets of ball mechanisms are disposed at the bottom of the second half-shell 11. When the user needs to tilt and drag the suitcase, the roller mechanisms located on the first half-shell 10 can be used to contact the ground and roll, while the two sets of ball mechanisms are separated from the ground. This facilitates the user's pushing and pulling operation of the suitcase.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A trolley case with easy steering, comprising a case body (1), characterized in that, The luggage further comprises a rolling assembly arranged at the bottom of the box body (1), the rolling assembly comprising: a connecting arm (2) arranged at the bottom of the box body (1), and the connecting arm (2) is formed with an assembly groove (20); a first steel ball (3) arranged in the assembly groove (20) and not less than three; a second steel ball (4) with a volume larger than the first steel ball (3), the second steel ball (4) extends into the assembly groove (20) and is in rolling cooperation with the first steel ball (3); and a cover (5) arranged on the connecting arm (2) and formed with a limiting hole (50); wherein the second steel ball (4) partially extends out of the limiting hole (50), and the second steel ball (4) is in rolling cooperation with the inner wall of the limiting hole (50).

2. The luggage case of claim 1, wherein, A plurality of the first steel balls (3) are arranged around the second steel ball (4) and symmetrically relative to the second steel ball (4).

3. The luggage case of claim 2, wherein, Any two adjacent first steel balls (3) are in contact and rolling cooperation with each other.

4. The luggage case of claim 2, wherein, The assembly groove (20) is a cylindrical groove, and the first steel balls (3) are in rolling cooperation with the bottom wall and the side wall of the assembly groove (20), respectively.

5. The luggage case of claim 4, wherein, The bottom wall and the side wall of the assembly groove (20) are both provided with a positioning groove in the shape of a spherical segment, and each first steel ball (3) is in rolling cooperation with the positioning groove.

6. The luggage case of claim 1, wherein, The cover (5) is detachably arranged on the connecting arm (2).

7. The luggage case of any of claims 1 to 6, wherein, The rolling assembly further comprises a roller mechanism, and the roller mechanism comprises a self-locking roller (6).

8. The luggage case of claim 7, wherein, The box body (1) comprises a first half shell (10) and a second half shell (11) which can be relatively opened and closed, and the luggage further comprises a pull rod (7) arranged on the first half shell (10); The roller mechanism has two groups, and the rolling ball mechanism also has two groups, both of which are arranged at the bottom of the first half shell (10), and both of which are arranged at the bottom of the second half shell (11).

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