Reflexive Box Lid Inversion for Compact Storage
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Solution Overview
Problem
Conventional containers, such as pizza boxes, expand significantly when the lid is opened, causing space inefficiency and obstruction, making it inconvenient for social interactions and storage when eating with others at small tables.
Innovation Solution
A container design featuring a reflexive lid with a top panel that folds back along a line of weakness, allowing it to be compactly stored underneath the main compartment, and optionally incorporating cut-out tabs for secure locking and a removable washable layer for cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the top panel is extended outwardly when open, then the container provides easy access to food, but the container occupies nearly twice the space of the main compartment
Solution Approach 1:
Instead of extending the top panel forward when opened, the patent inverts the opening direction by causing the top panel to fold backward along the rear panel. This reverses the conventional opening motion, allowing the lid to collapse toward the back of the container rather than extending outward, thereby maintaining accessibility while minimizing space occupation.
Solution Approach 2:
The patent utilizes the depth dimension of the container by positioning the fold line at a specific depth from the rear panel top edge. This allows the top panel to fold backward along the depth axis rather than extending outward in the horizontal plane, effectively using the container's internal depth to accommodate the opened lid and reduce the container's external footprint.
2Ease of operation
If the top panel is positioned parallel to the bottom panel when open, then food access is improved, but the panel collides with plates or containers of other people
Solution Approach 1:
The patent inverts the opening direction so that the top panel folds backward instead of extending forward. This reversal ensures that when the container is opened, the lid moves toward the back of the container rather than protruding outward toward other diners' plates or containers, thereby eliminating the collision problem while maintaining food accessibility.
3Volume of moving object
If the top panel is positioned perpendicular to the bottom panel when open, then space usage is reduced, but it creates a barrier between people wishing to converse
Solution Approach 1:
By inverting the opening direction to fold backward, the patent ensures that the top panel does not extend forward to create a social barrier. Instead, the lid collapses toward the back of the container, keeping the front area open and accessible for social interaction while still achieving compact space utilization.
4Volume of moving object
If the fold line is positioned at a specific depth from the rear panel top edge, then the top panel can be stored compactly underneath the main compartment, but the structural complexity increases
Solution Approach 1:
The patent segments the top panel into two distinct sections: a front section and a rear section, divided by the fold line positioned at a specific depth from the rear panel top edge. This segmentation allows the rear section to fold backward and store compactly underneath the main compartment, achieving space savings while maintaining relatively simple construction through a single fold line.
Data Source
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AI summary
A reflexive lid having a top panel (210) including a top-panel front section (210A) and a top-panel rear section (210B) connected along a fold line (240). The top panel rear section (210B) is foldably connected to a rear-panel top edge of a container, where the rear panel top edge of the container is at a height (H) above a bottom panel of the container and the fold line (240) is a depth (D) from the rear panel top edge, wherein the depth is either one of substantially the same as height H or greater than height H.