Two-Part Lap Tray Design for Combined Eating and Drawing Activities
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Solution Overview
Problem
Conventional highchair trays fail to meet the needs of children by lacking a suitable ergonomic design for lap use and combining functional surfaces for eating and engaging in activities like drawing, as they often have limited flat areas for writing or playing and are not designed to fit comfortably on a child's lap.
Innovation Solution
A multi-purpose tray apparatus featuring a base tray with a desk surface and a food tray that nests into the base tray, providing a comfortable, ergonomic fit with compressible material on the bottom and a non-compressible molded plastic top, allowing for both eating and engaging in activities like drawing, with a design that prevents sliding and includes a strap apparatus for portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a highchair tray uses a traditional design with food compartments only, then it provides adequate space for eating, but it lacks sufficient flat area for drawing or playing activities
Solution Approach 1:
The tray is divided into two separate but complementary parts: a base tray with a large flat desk surface for drawing and playing, and a removable food tray with compartments for eating. This segmentation allows each part to optimize its specific function while together they provide multi-functionality.
Solution Approach 2:
The base tray serves multiple purposes: it provides a large flat surface for drawing activities, supports the food tray when needed, and can function independently for non-meal activities. The food tray similarly serves both eating and can be nested for storage, making the overall system universally applicable to various child activities.
2Ease of operation
If a highchair tray is designed to engage with a high chair, then it provides stable support, but it lacks ergonomic form to fit comfortably on a child's lap
Solution Approach 1:
The tray system transitions from a static high-chair-mounted design to a dynamic, portable lap tray that can be easily moved and positioned. The resilient bottom material allows the tray to adapt to different lap contours, while the nesting capability enables compact storage and transport, making it versatile for various locations and situations.
Solution Approach 2:
The bottom of the base tray incorporates resilient material that changes its physical parameters under pressure, allowing it to conform to the ergonomic contours of a child's lap. This parameter change enables comfortable lap fitting while maintaining structural integrity and support.
3Ease of operation
If a tray uses only hard plastic material, then it provides a stable and easy-to-clean surface, but it lacks comfort when contacting a child's skin
Solution Approach 1:
Different parts of the tray are made from different materials with different properties: the bottom surface contacting the child's lap is made from soft, resilient material for comfort, while the top surfaces (desk surface and food tray) are made from hard, non-compressible plastic for structural integrity and ease of cleaning. This local differentiation of material quality resolves the contradiction between comfort and strength.
Solution Approach 2:
The base tray combines two distinct materials: a resilient bottom layer for comfort and a hard plastic top layer for durability and cleanability. This composite construction allows each material to perform its optimal function, providing both comfort against skin and structural strength for supporting activities.
4Adaptability or versatility
If a tray apparatus includes both food compartments and a large desk surface, then it provides multi-functionality, but it increases device complexity
Solution Approach 1:
The multi-functional tray is segmented into two separate trays rather than attempting to integrate all functions into a single complex structure. The base tray handles drawing and playing functions, while the removable food tray handles eating functions. This segmentation reduces overall structural complexity while maintaining multi-functionality through modular design.
Solution Approach 2:
The food tray nests within the base tray when not in use, creating a compact configuration that simplifies storage and transport. This nesting arrangement allows both functional surfaces to coexist in a space-efficient manner, reducing the apparent complexity of having dual功能的 tray system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tray apparatus provides comfort and stability, allowing children to eat and engage in activities without sacrificing surface area, with the food tray being dishwasher safe and the strap apparatus ensuring easy carrying, thus addressing the need for a versatile and ergonomic solution for children's tray needs.
Implementation Method 1
the bottom side having a resilient material that fits comfortably on a lap of a child where the resilient material is compressible by a human hand
Data Source
AI summary
A two-part tray apparatus that includes a base tray having a desk surface for drawing and writing and a food tray having four food compartments. A resilient bottom of the base tray may rest on a lap. The food tray is nestable into the base tray and is nonslideable relative to the base tray. The base tray includes a proximal side with no upwardly extending walls to make it easy for a child to write or draw on the desk surface. Strap units are included to anchor opposite ends of the tray apparatus or may be connected to each other to form a full length shoulder strap.