Draw-bar outer tube, draw-bar assembly and draw-bar box

Abstract

The utility model discloses a draw bar outer tube, draw bar subassembly and draw bar box, draw bar outer tube includes outer tube body, the inner cavity of outer tube body is equipped with the isolation strip that extends along the length direction of outer tube body, the isolation strip divides the inner cavity of outer tube body into cushion chamber and the installation chamber that is used for the telescopic cooperation with inner tube. The pull rod assembly comprises at least one pull rod outer pipe. The draw-bar box comprises a box body and the draw bar assembly, the draw bar assembly is arranged on the back face of the box body, and the buffer cavity of the outer pipe body is located on the side, away from the box body, of the installation cavity. The anti-collision pull rod assembly has good anti-collision performance, and normal use of the pull rod assembly cannot be interfered even if the outer pipe of the anti-collision pull rod assembly slightly deforms.

Description

A pull rod outer tube, a pull rod assembly, and a pull rod case Technical Field

[0001] This utility model relates to the field of trolley case technology, specifically to a trolley outer tube, a trolley assembly, and a trolley case. Background Technology

[0002] To avoid impacting the internal storage space of a suitcase, some suitcases place the pull handle assembly on the back of the case. However, this design makes the pull handle assembly, protruding from the back of the case, a direct impact to the back of the suitcase can cause it to become a primary point of force, resulting in dents and affecting its functionality. While higher-strength materials can be used to manufacture the pull handle assembly, this undoubtedly increases the cost. Summary of the Invention

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a pull rod outer tube, a pull rod assembly and a pull rod case, which have good anti-collision performance, and even if the outer tube is slightly deformed, it will not interfere with the normal use of the pull rod assembly.

[0004] To achieve the above objectives, this utility model discloses a tie rod outer tube, which includes an outer tube body. An isolation strip extending along the length direction of the outer tube body is provided in the inner cavity of the outer tube body. The isolation strip divides the inner cavity of the outer tube body into a buffer cavity and an installation cavity for telescopic cooperation with the inner tube.

[0005] The cross-sectional area of ​​the buffer cavity is smaller than that of the mounting cavity.

[0006] Two isolation strips are provided, which are spaced apart from each other and located on both sides of the inner cavity of the outer tube body in the width direction.

[0007] The outer wall surface adjacent to the buffer cavity in the thickness direction of the outer tube body is arc-shaped, and the direction of the arc pointing to its center is away from the inner cavity of the outer tube body.

[0008] Several stiffening ribs are arranged at intervals on the outer wall surface of the outer tube body along the thickness direction and adjacent to the buffer cavity, and the length direction of the stiffening ribs is the length direction of the outer tube body.

[0009] The width of the outer tube body is greater than its thickness.

[0010] This utility model also discloses a pull rod assembly, which includes a handle, at least one inner tube and at least one pull rod outer tube as described above. The inner tube and the outer tube body correspond one-to-one. The upper end of the inner tube is connected to the handle, and the lower end of the inner tube is inserted into the mounting cavity of the outer tube body and engages in telescopic cooperation.

[0011] The grip includes an upper shell and a lower shell, the upper shell being detachably connected to the lower shell, and the inner tube being connected to the lower shell; the top surface and the outer side of the grip in the longitudinal direction are both located on the upper shell, and the upper shell is made of metal.

[0012] The upper end of the outer tube body is connected to a first sealing member, the portion of the first sealing member protruding from the outer tube body, and its shape is adapted to the shape of the outer tube body.

[0013] In addition, this utility model also discloses a trolley case, which includes a case body and the aforementioned trolley assembly. The trolley assembly is disposed on the back of the case body, and the buffer cavity of the outer tube body is located on the side of the mounting cavity away from the case body.

[0014] By adopting the above solution, an isolation strip is installed inside the outer tube body, dividing the inner cavity into a buffer cavity and a mounting cavity. When the outer tube body is slightly deformed by impact, as long as the deformation does not exceed the buffer cavity, it is unlikely to interfere with the normal use of the pull rod assembly. Furthermore, the outer wall surface of the outer tube body, adjacent to the buffer cavity, is made arc-shaped along its thickness direction. This reduces the area of ​​contact with the impacting object, and reinforcing ribs are added to it, making it less prone to deformation and providing higher strength. Additionally, making the upper shell of the grip a metal component also makes the grip less susceptible to deformation or damage upon impact. Attached Figure Description

[0015] Figure 1 is a schematic diagram of this utility model;

[0016] Figure 2 is a schematic diagram of the cross-section of the outer tube of the tie rod;

[0017] Figure 3 is a schematic diagram of the first sealing component;

[0018] Figure 4 is a schematic diagram (sectional view) of the assembly of the outer tube body, the middle tube and the inner tube.

[0019] Figure 5 is an exploded view of the grip;

[0020] Figure 6 is a schematic diagram of the grip from another perspective.

[0021] Explanation of symbols for main components:

[0022] Box 10;

[0023] Outer tube body 20; isolation strip 21; buffer cavity 22; mounting cavity 23; stiffening rib 24; first sealing element 25;

[0024] Inner tube 30;

[0025] Grip 40; Upper shell 41; Lower shell 42;

[0026] Medium tube 50. Detailed Implementation

[0027] As shown in Figures 1-6, this utility model discloses a trolley case, which includes a case body 10 and a trolley assembly disposed on the back of the case body 10.

[0028] The pull rod assembly includes a handle 40, at least one inner tube 30, and at least one outer tube. The outer tube is fixedly connected to the housing 10. The inner tube 30 corresponds to the outer tube and is telescopically connected. The inner tube 30 is connected to the handle 40. Of course, the pull rod assembly can be expanded, for example, by adding at least one middle tube 50, which corresponds to the inner tube 30. The relationship between the inner tube 30, middle tube 50, and outer tube is existing technology and not the focus of this case, so it will not be elaborated further. In this connection structure, the outer wall surface of the outer tube in the thickness direction, that is, the outer wall surface of the outer tube away from the housing 10 (hereinafter referred to as the first wall surface), is the part most susceptible to impact. This case mainly focuses on the anti-collision design of the pull rod assembly.

[0029] First, the structure of the tie rod outer tube was optimized. Specifically, the tie rod outer tube includes an outer tube body 20. An isolation strip 21 extending along the length (or depth) of the outer tube body 20 is provided in the inner cavity of the outer tube body 20. The isolation strip 21 divides the inner cavity of the outer tube body 20 into a buffer cavity 22 and an installation cavity 23. The inner tube 30 (and the middle tube 50) are in telescopic cooperation with the installation cavity 23.

[0030] Two isolation strips 21 are provided, spaced apart from each other and located on opposite sides of the inner cavity of the outer tube body 20. This facilitates the stability of the mounting cavity 23 and reduces weight. Alternatively, the two isolation strips 21 can be connected to form a single plate. The isolation strips 21 are positioned close to the first wall surface with a gap between them. This allows the cross-sectional area of ​​the buffer cavity 22 to be smaller than that of the mounting cavity 23. The buffer cavity 22 does not need to be very large to avoid making the thickness of the tie rod assembly too large and obtrusive. Preferably, the outer tube body 20 is a flat tube, meaning that the width of the outer tube body 20 is greater than its thickness. The width direction of the flat tube is parallel to the back of the box body 10, which allows the first wall surface of the outer tube body 20 to be closer to the box body 10, reducing the risk of impact or force.

[0031] The buffer cavity 22 is located on the side of the mounting cavity 23 away from the housing 10. In this way, when the first wall is deformed by impact, the mounting cavity 23 will not be affected when the amount of deformation is small due to the setting of the buffer cavity 22, thus ensuring that the tie rod assembly can be used normally.

[0032] In addition, a first sealing member 25 is usually provided at the upper port of the outer tube body 20. The first sealing member 25 is partially inserted into the inner cavity of the outer tube body 20. Because the first wall surface is arc-shaped and has stiffening ribs 24, in order to make the setting of the first sealing member 25 not abrupt, the part of the first sealing member 25 protruding from the outer tube body 20 is required to match the shape of the outer tube body 20. That is, the part of the first sealing member 25 protruding from the outer tube body 20 and located directly above the first wall surface is also arc-shaped. Then, a protrusion similar to the stiffening rib 24 is provided. In this embodiment, the outer tube body 20 is made of metal material to further improve strength. The first sealing member 25 is made of plastic material. The first sealing member 25 is inserted into the upper port of the outer tube body 20 to prevent the end of the metal outer tube body 20 from injuring the user. At the same time, the inner tube 30 (and the middle tube 50) will not directly contact the metal inner surface of the outer tube body 20, reducing frictional wear.

[0033] In this case, the handle 40 of the pull rod assembly was also designed. Specifically, the handle 40 includes an upper housing 41, a lower housing 42, a button, and two transmission steel bars. The button and transmission steel bars are not the focus of this case and will not be described in detail. The upper housing 41 is connected to the lower housing 42 by bolts. Alternatively, other detachable connection methods such as snap-fit ​​connections can also be used. The inner tube 30 is connected to the lower housing 42. The top surface and the outer side of the handle 40 along its length (i.e., the surface of the handle 40 facing the outside of the housing 10) are both located on the upper housing 41. The upper housing 41 is made of metal. In this way, the parts of the handle 40 that are easily impacted are all made of metal, which can improve the strength of the handle 40 and make it less prone to damage.

[0034] The key to this invention lies in the fact that by setting an isolation strip 21 in the inner cavity of the outer tube body 20, the inner cavity of the outer tube body 20 is divided into a buffer cavity 22 and a mounting cavity 23. When the outer tube body 20 is slightly deformed by impact, as long as the deformation does not exceed the buffer cavity 22, it is not likely to interfere with the normal use of the pull rod assembly. In addition, the outer wall surface of the outer tube body 20 in the thickness direction and adjacent to the buffer cavity 22 is set as an arc shape. This outer wall surface has a smaller contact area with the impacting object when it is impacted, and a stiffening rib 24 is added to it. Therefore, the outer wall surface is less likely to deform when impacted and has high strength. Furthermore, making the upper shell 41 of the grip 40 a metal part can also make the grip 40 less likely to deform or be damaged when it is impacted.

[0035] The above description is merely an embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A tie rod outer tube, characterized in that: The device includes an outer tube body, and the inner cavity of the outer tube body is provided with a partition strip extending along the length direction of the outer tube body. The partition strip divides the inner cavity of the outer tube body into a buffer cavity and an installation cavity for telescopic cooperation with the inner tube.

2. A drawbar outer tube according to claim 1, characterised in that: The cross-sectional area of ​​the buffer cavity is smaller than that of the mounting cavity.

3. The tie rod outer tube according to claim 1, characterized in that: Two isolation strips are provided, which are spaced apart from each other and located on both sides of the inner cavity of the outer tube body in the width direction.

4. The tie rod outer tube according to claim 1, characterized in that: The outer wall surface adjacent to the buffer cavity in the thickness direction of the outer tube body is arc-shaped, and the direction of the arc pointing to its center is away from the inner cavity of the outer tube body.

5. The tie rod outer tube according to claim 1, characterized in that: Several stiffening ribs are arranged at intervals on the outer wall surface of the outer tube body along the thickness direction and adjacent to the buffer cavity, and the length direction of the stiffening ribs is the length direction of the outer tube body.

6. The tie rod outer tube according to claim 1, characterized in that: The width of the outer tube body is greater than its thickness.

7. A tie rod assembly, characterized in that: It includes a handle, at least one inner tube, and at least one outer tube of a pull rod as described in any one of claims 1-6, wherein the inner tube corresponds one-to-one with the outer tube body, the upper end of the inner tube is connected to the handle, and the lower end of the inner tube is inserted into the mounting cavity of the outer tube body and engages in telescopic cooperation.

8. A drawbar assembly according to claim 7, wherein: The grip includes an upper shell and a lower shell, the upper shell being detachably connected to the lower shell, and the inner tube being connected to the lower shell; the top surface and the outer side of the grip in the longitudinal direction are both located on the upper shell, and the upper shell is made of metal.

9. A tie rod assembly according to claim 7, characterized in that: The upper end of the outer tube body is connected to a first sealing member, the portion of the first sealing member protruding from the outer tube body, and its shape is adapted to the shape of the outer tube body.

10. A trolley case characterised by: The device includes a housing and a pull rod assembly as described in any one of claims 7-9, wherein the pull rod assembly is disposed on the back side of the housing, and the buffer cavity of the outer tube body is located on the side of the mounting cavity away from the housing.

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