Portable stair-climbing draw-bar box

Abstract

The invention relates to a portable stair-climbing draw-bar box, which comprises a draw-bar box body (1), wherein a telescopic draw bar (4) is arranged at one side of the draw-bar box body (1) in the length direction; the draw bar (4) comprises two telescopic stretching bars (4-1) and a connecting bar (5) used for connecting the two stretching bars (4-1); the portable stair-climbing draw-bar box also comprises a flat wheel plate (2); the flat wheel plate (2) is arranged at the back side of the draw-bar box body (1) and is rotationally connected with and the bottom end of the draw bar (4) through a wheel bar mechanism; and rolling wheels (14) are distributed and arranged on the flat wheel plate (2). By using the structure, the portable stair-climbing draw-bar box has the advantages that the structure is simple and reasonable; the contact area of the draw-bar box and the stairs is increased through the flat wheel plate; the relative movement of wheels of the draw-bar box and the stairs is changed into the sliding of the flat plate and the stairs, so that the draw-bar box is stable and achieves the labor-saving effect when going upstairs or downstairs; and articles in the box are protected. After the stair-climbing operation is completed, the flat wheel plate is collected into a recessed part of the box body; the flat wheel plate is clamped in the recessed part of the box body; the integral appearance of the draw-bar box is not obviously changed; and the attractive appearance of the original design of bags and suitcases cannot be damaged.

Description

technical field [0001] The invention belongs to the field of trolley cases, in particular to a portable trolley case capable of climbing stairs. Background technique [0002] Trolley cases play an important role in everyday life, especially when traveling. The trolley case allows us to easily carry a large amount of daily necessities. On generally flat roads, the trolley case is easy to use and very labor-saving. However, in the process of going up and down the stairs, the trolley case is laborious to drag, and forced dragging will greatly shorten the life of the trolley case. [0003] The common trolley case is provided with traveling wheels at the bottom, and has a retractable trolley to facilitate its walking on flat ground. However, when going up and down stairs or encountering obstacles, it is easy to rub the bottom of the trolley case against the stair steps or obstacles, thereby causing damage to the trolley case. At this time, manpower is still required to lift t...

AI Technical Summary

Problems solved by technology

However, when going up and down stairs or encountering obstacles, it is easy to rub the bottom of the trolley case against the stair steps or obstacles, thereby causing damage to the trolley case

At this time, manpower is still required to lift the trolley case, causing the trolley case to lose its portability and labor-saving effect, and it is impossible to effectively avoid obstacles or go up and down stairs while pulling the case.

At present, many trolley cases that can climb stairs have also been reported, but most of them are inconvenient to use, or the cost is too high, which greatly limits the application in the market

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