Pivoting Handle Suitcase for Stair Navigation
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Solution Overview
Problem
Conventional rolling suitcases struggle to navigate stairs efficiently, requiring excessive effort and risking slipping due to inadequate wheel performance on stair surfaces and dragging along edges.
Innovation Solution
A suitcase design featuring a handle arrangement that pivots from a basic position for horizontal surfaces to a special position for stairs, allowing for sliding or rolling along stair edges, combined with transport means like rollers, runners, or treadmills, and a protective film on the underside and back to prevent scratching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional rolling suitcases are used on stairs, then the suitcase can be transported, but excessive effort is required and slipping occurs due to inadequate wheel performance on stair surfaces
Solution Approach 1:
The handle arrangement is designed to be movable between a basic position for horizontal surfaces and a special position for stairs. This dynamic reconfiguration allows the suitcase to adapt its handling mechanism to the specific terrain, enabling the user to pull the suitcase at an optimized angle when ascending or descending stairs, thereby reducing the required force and improving stability control
Solution Approach 2:
The invention changes the operational parameters by introducing a movable handle arrangement that can be positioned differently for different surfaces. When on stairs, the handle is repositioned to allow pulling at an angle that reduces the component of force required to overcome friction and gravity, directly addressing the excessive effort problem while maintaining reliable control
2Ease of operation
If the rolling suitcase drags along the edges of stair steps, then the suitcase can be moved up or down stairs, but safe handling is compromised and slipping occurs
Solution Approach 1:
The movable handle arrangement enables dynamic adjustment of the pulling angle and posture when navigating stairs. In the special position, the handle allows the user to maintain better balance and control, preventing the suitcase from dragging along the edges and reducing the risk of slipping, thereby improving both ease of operation and reliability simultaneously
3Force
If sliding profiles are added to the back wall of the suitcase, then less force is required to drag the suitcase up or down stairs, but real relief is not provided and the complexity increases
Solution Approach 1:
Instead of adding static sliding profiles that increase structural complexity, the invention employs a dynamic handle arrangement that can be repositioned. This approach reduces the required force through optimized pulling geometry without adding permanent structural elements, thereby achieving force reduction while minimizing increases in device complexity
Data Source
Figure 1A~1B
Figure 2A
Figure 2B~3
AI summary
A case (100) with a case area (14) for receiving and transporting objects and with transport means arranged in the area of a bottom (U) and/or rear of the case area (14). A handle arrangement (200) is attached to the case (100), which in a basic position enables the case (100) to be maneuvered along a substantially horizontal surface and which in a special position enables the case (100) to be maneuvered sliding or rolling along a staircase or inclined surface, wherein the handle arrangement (200) can be moved from the basic position to the special position by a pivoting movement.