Portable crib to support full-size mattress
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Solution Overview
Problem
Traditional portable cribs are cumbersome to set up and not easily movable, while traditional play yards offer portability but do not accommodate full-size crib mattresses due to safety concerns regarding gaps between the mattress and frame, which can create suffocation hazards.
Innovation Solution
A portable crib with a foldable tubular frame and breathable mesh panels that supports a full-size crib mattress, featuring a fabric cover to minimize gaps between the mattress and sidewalls, and a perimeter frame that can be decoupled or folded separately for storage and travel, using tubular members and MDF or other rigid materials for increased structural rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional portable cribs use a foldable frame design for portability, then ease of moving is improved, but the ability to support full-size crib mattresses is worsened due to safety gaps
Solution Approach 1:
The frame is divided into two separate segments: an outer foldable frame for portability and an inner rigid perimeter frame for safety. The inner frame remains stationary to maintain safe gaps with the mattress, while the outer frame folds for storage and transport.
Solution Approach 2:
A fabric cover acts as an intermediary element that connects the outer and inner frames while maintaining the critical safety gap. The fabric is taut and non-stretching to prevent gap formation between the mattress and inner frame, yet allows the overall structure to remain portable.
2Strength
If traditional play yards use thick fabric sidewalls for structure, then structural integrity is improved, but breathability is worsened creating suffocation hazards
Solution Approach 1:
The fabric cover uses a taut, non-stretching membrane material that provides structural integrity while maintaining breathability. The thin film structure allows air circulation unlike thick fabric, preventing suffocation hazards while still providing necessary structural support.
Solution Approach 2:
The fabric cover is designed with porous or mesh characteristics that allow air flow through the material, maintaining breathability while providing the necessary structural integrity to prevent collapse and ensure safety.
3Adaptability or versatility
If foldable play yards use stretched fabric sidewalls for flexibility, then ease of folding is improved, but gap formation between sidewalls and mattress is worsened
Solution Approach 1:
The sidewall structure is segmented into a rigid inner perimeter frame that maintains precise positioning relative to the mattress, and an outer foldable frame that provides flexibility. This segmentation allows the inner frame to prevent gap formation while the outer frame enables folding.
Solution Approach 2:
The fabric cover is designed with specific tension and non-stretching properties that change its physical parameters to prevent deformation and gap formation. The material parameters are selected to maintain constant distance between the sidewalls and mattress during use.
Data Source
AI summary
A portable crib including a full-size crib mattress having an upper and a lower surface and a frame configured to be covered by the fabric cover to define crib sidewalls. The frame includes a collapsible top assembly including top rails, a collapsible bottom assembly including support rails to support the crib mattress, and a perimeter frame at least partially surrounded by the fabric cover to define at least a portion of the crib sidewall to surround the crib mattress and disposed between the upper and lower surfaces of the crib mattress at a predefined horizontal distance between an outer perimeter of the crib mattress and the perimeter frame.