Wrap Around Case Asymmetric Cutout for Opening
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Solution Overview
Problem
Existing wrap around cases face challenges in ease of opening and fall resistance, with structures like perforated tear lines not facilitating easy access and repackaging, while belt-shaped cut-off sections compromise repackaging capabilities.
Innovation Solution
A wrap around case design featuring a perforated tear section along the ridgeline between the top face panel and side face panels, an overlap section extending from the top panel to the bottom, and a strategically positioned cutout portion that allows for easier opening by concentrating load on one side, maintaining fall resistance and enabling repackaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a perforated tear section is formed along the ridgeline between the top face panel and side face panels, then the case maintains fall resistance and structural integrity, but the ease of opening is reduced because the top face panel is not easily opened
Solution Approach 1:
The opening structure is segmented into two functional parts: a perforated tear section for maintaining structural integrity and a separate overlap section with a gap for easy opening. The overlap section extends from the top face panel toward the bottom face panel and includes a gap that allows the top face panel to be easily pulled open while the perforated tear section remains intact to maintain fall resistance.
2Ease of operation
If a belt shaped cut-off section is provided to enable simple opening by gripping and pulling, then the ease of opening is improved, but the repackaging ability is lost because the cut-off section is detached
Solution Approach 1:
The overlap section is pre-formed with a gap during manufacturing, eliminating the need for cutting or detaching operations. This preliminary preparation allows the user to simply grip and pull the overlap section to open the case, while the perforated tear section remains connected to enable repackaging by folding the overlap section back into place.
3Device complexity
If the cutout portion is positioned at the center of the lower side outer flap, then the structure is symmetric and simple, but the load distribution during opening becomes uneven and requires two-handed operation
Solution Approach 1:
The cutout portion is positioned asymmetrically at an end edge of the lower side outer flap rather than at the center. This asymmetric positioning creates an uneven distribution of load during opening, allowing the user to grip and pull with one hand at the gap in the overlap section, thereby improving ease of operation while maintaining structural simplicity.
Data Source
AI summary
A wrap around case including: a case body that includes a top face panel and a bottom face panel, a front face panel and a back face panel, and a pair of side face panels, and that is formed with a perforated tear section running along a ridgeline formed by the top face panel and each of the pair of side face panels; and an overlap section that extends from the top face panel toward the bottom face panel side and overlaps the front face panel, and that is formed with a gap to an edge portion at the bottom face panel side of a cutout portion formed at a position offset to one end side or another end side of the center, along the facing direction of the side face panels, of an edge portion at the top face panel side of the front face panel.