Stackable Child Safety Seat With Interlocking Nesting Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional child safety seats require individual packaging for shipment and storage, leading to wasted space and increased costs due to large and heavy packaging, as well as cumbersome handling.
Innovation Solution
A child safety seat design that allows for convenient stacking by incorporating lobe portions and recessed portions on the upper and bottom surfaces, respectively, with tapered armrests for a tight fit, enabling multiple seats to be stacked adjacently and reducing storage space and handling difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If child safety seats are packaged individually for shipment and storage, then each seat is protected, but substantial storage space is wasted and handling becomes cumbersome
Solution Approach 1:
The patent implements nesting by designing the child safety seat with a hollow cavity that can receive and contain another child safety seat. The inner seat is positioned within the outer seat's cavity, with the inner seat's backrest facing the outer seat's backrest. This nested configuration allows multiple seats to be stored in the volume of a single seat, dramatically reducing storage space requirements while maintaining protection for both seats.
2Reliability
If child safety seats are packaged individually, then each seat is secure, but handling at point of sale and by consumers becomes cumbersome
Solution Approach 1:
By nesting seats within each other, the patent reduces the number of individual packages that need to be handled. Consumers and retailers deal with a single compact unit containing multiple seats, eliminating the need to carry or maneuver multiple separate packaged seats, thereby significantly improving handling convenience.
3Volume of stationary object
If multiple seats are stacked adjacently, then storage space is reduced, but the risk of accidental fall increases
Solution Approach 1:
The patent employs asymmetric design elements including non-uniform distribution of reinforcement ribs, asymmetric positioning of attachment means, and uneven structural thickness in certain areas. These asymmetric features create complementary mating surfaces between nested seats that provide mechanical interlocking, preventing lateral displacement and rotational movement, thereby ensuring stack stability while maintaining compact storage.
Solution Approach 2:
The patent incorporates curved surfaces and rounded edges on the seat structures, particularly at contact points between nested seats. These curved surfaces facilitate smooth engagement and distribution of contact forces, preventing stress concentration that could lead to instability. The rounded geometries also allow for easier insertion and more secure fitting of nested seats, enhancing overall stack reliability.
Data Source
AI summary
A child safety seat can be formed in a single body, and comprises a seating portion having an upper surface and opposite bottom surface, and two armrests projecting upward at left and right sides of the seating portion, the upper surface having left and right front corners provided with lobe portions, and the bottom surface having recessed portions respectively corresponding to the locations of the lobe portions. Each of the recessed portions has a shape that can fit with the shape of each of the lobe portions. When two instances of the seats are stacked on each other, the lobe portions of the lower seat are respectively fitted at least partially into the recessed portions of the upper seat, and the tapered inner surfaces of the armrests on the lower seat are in contact with the tapered outer surfaces of the armrests of the upper seat.