Foldable Trolley Case Grab Structure for Easy Folded Lifting
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Solution Overview
Problem
Existing foldable trolley cases lack a convenient and reliable mechanism for lifting in the folded state, often requiring complex structures or uncomfortable hand postures to lift the entire weight, and existing solutions are not user-friendly or structurally simple.
Innovation Solution
A foldable trolley case design where the rear part is nested in a first cavity of the front part, forming a grab part with the handle partially or fully nested within, allowing single-hand lifting, and a triangular self-standing structure with feet for stability, eliminating the need for additional grip structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a foldable trolley case is designed without additional grip structures to maintain structural simplicity, then device complexity is reduced, but ease of operation deteriorates due to lack of convenient lifting mechanism in folded state
Solution Approach 1:
The handle is nested within the first cavity of the front part when retracted, forming an integrated grab part with the top surface. This nesting arrangement eliminates the need for separate grip structures while providing a convenient lifting interface, directly resolving the contradiction between structural simplicity and lifting convenience
Solution Approach 2:
The top surface of the front part serves dual functions: as a structural component of the case body and as part of the grab part for lifting. This multi-functionality eliminates the need for additional dedicated grip structures, maintaining structural simplicity while enabling easy operation
2Length of stationary object
If the handle is completely retracted into the rear part to reduce thickness, then the folded state thickness is reduced, but ease of operation deteriorates due to insufficient exposure for gripping
Solution Approach 1:
The handle is partially nested within the first cavity rather than completely retracted, allowing it to remain exposed enough for comfortable gripping while still achieving significant thickness reduction. This partial nesting optimizes the balance between compactness and operability
Solution Approach 2:
The handle positioning is optimized locally within the first cavity to provide sufficient exposure for gripping while maintaining overall compactness. The local arrangement of the handle within the cavity space ensures both thickness reduction and gripping convenience
Data Source
AI summary
Provided is a foldable trolley case including a rear part (1), a foldable part (3) and a front part (2), which collectively form a case body, the rear part (1) is provided with a rod (4), the front part (2) is provided with a first cavity (5); in a folded state, the foldable part (3) is folded by the rear part (1) and the front part (2) and is accommodated in the first cavity (5), a top portion (6) is nested in the first cavity (5), a handle (7) having been retracted of the rod (4) is located within the top portion (6) or on a rear side of the top portion (6), the handle (7) is nested at least partially within the first cavity (5), a top surface of the front part (2) and the handle (7) together form a grab part.