Litter Box Peg-and-Tab Liner Design for Gap Prevention
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Solution Overview
Problem
Existing litter box liners fail to effectively prevent litter, urine, or debris from getting between the liner and the litter box walls, leading to aesthetic issues and potential hygiene problems.
Innovation Solution
A litter box design featuring a container with upward or horizontally projecting pegs, and a liner with tabs that fit over the pegs, securely holding the liner in place along the circumference of the top, thereby preventing gaps and debris accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the liner is draped over the top rim of the litter box, then the liner can be easily installed, but gaps form between the liner and the walls allowing litter and debris to escape
Solution Approach 1:
The attachment system is segmented into multiple discrete points (pegs distributed along the circumference) rather than a continuous attachment. This segmentation allows the liner to be easily installed at specific points while maintaining secure attachment at each segment, preventing gaps between the liner and container walls.
Solution Approach 2:
Pegs serve as intermediary elements between the container and the liner tabs. The pegs project from the container wall and receive the tabs, creating a reliable mechanical connection that prevents the liner from detaching or forming gaps, while still allowing for easy installation and removal.
2Reliability
If hooks are used to attach the liner to the rim, then the liner can be held in place, but the hooks slide along the rim creating gaps
Solution Approach 1:
The tab geometry is asymmetric with a one-way attachment mechanism. The tab can be easily inserted onto the peg but cannot slide off or move laterally, preventing the hook-like sliding motion. This asymmetric design provides reliable positioning while eliminating gaps through precise angular orientation of the tab on the peg.
Solution Approach 2:
Instead of having the liner actively grip the container (as hooks would), the container provides passive pegs that the liner tabs passively engage. This inversion of the active-passive relationship simplifies the design and eliminates the sliding problem inherent in hook-based systems.
3Reliability
If the liner is held tightly against the container walls, then litter and debris are prevented from escaping, but the liner becomes difficult to remove
Solution Approach 1:
The attachment system is dynamic rather than static. The tabs can be easily inserted onto the pegs and removed by lifting or pulling motion, providing temporary but secure attachment during use. This dynamic characteristic allows the liner to be held tightly against the walls for debris containment while remaining easily removable for cleaning or replacement.
Data Source
AI summary
A litter box includes a container having a wall and pegs that project upward from a top of the wall or horizontally from an inner surface of the wall, the plurality of pegs being distributed along a circumference of the container. A liner is insertable into the container with tabs connected along an upper edge of the liner. Each tab includes a connection part and a stiffener part. The connection part extends upward from the upper edge of the liner and has an opening in which a respective peg of the pegs is received to hold the liner in position in the container. The stiffener part of each tab extends laterally from opposing sides of the upper portion and holds the liner against the wall of the container when the tab is connected to the respective peg.