Stackable Plastic Booster Seat With Anti-Sliding Seat Geometry
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Solution Overview
Problem
Conventional booster seats are not stackable, promote poor posture, have unstable height adjustment mechanisms, and often lead to children sliding forward, which can be unsafe and uncomfortable.
Innovation Solution
A molded booster seat with a rearwardly and downwardly angled seat, integrated lumbar support, and adjustable feet that allow for secure stacking and height adjustment, ensuring stability and promoting good posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional booster seats are stacked, then space is conserved, but the stack begins to lean and collapse
Solution Approach 1:
The booster seat is divided into separate functional components: a base unit with stacking geometry and removable foot units. The base unit contains integrated stacking surfaces with geometric features (protrusions and recesses) that enable stable stacking without requiring additional attachment mechanisms. This segmentation allows the stacking function to be isolated and optimized independently.
Solution Approach 2:
The stacking surfaces incorporate curved and rounded geometric features, including cylindrical protrusions and recesses, rather than sharp angular contacts. These curved surfaces distribute contact forces more evenly and provide self-aligning characteristics that prevent leaning during stacking, enhancing stack stability.
2Ease of manufacture
If the seat surface is horizontal or slopes downward, then manufacturing is simple, but the child slides forward against the safety bump
Solution Approach 1:
Instead of sloping the seat downward toward the front (conventional design), the seat surface is inverted to slope upward toward the front at approximately 10 degrees. This reverse slope uses gravity to prevent the child from sliding forward, directing them naturally toward the lumbar support and away from the safety bump at the front edge.
Solution Approach 2:
The seat surface angle is specifically designed to be approximately 10 degrees upward from horizontal, rather than being flat or sloping downward. This parameter change optimizes the balance between manufacturing simplicity and preventing forward sliding, creating a gentle incline that enhances safety without requiring complex mechanisms.
3Ease of manufacture
If the back is curved like a barrel, then manufacturing is simple, but the child develops poor posture with hunched shoulders
Solution Approach 1:
The backrest incorporates a localized lumbar support region with specific geometric features (protrusions or contours) positioned to support the child's lower back. Rather than using a uniform barrel curve throughout, the back has differentiated zones: a lower lumbar support area and an upper back area, providing targeted posture support while maintaining manufacturing simplicity through molded geometry.
4Device complexity
If the height adjustment mechanism is permanently fixed, then the structure is simple, but the seat cannot be adjusted for different heights
Solution Approach 1:
The foot units are designed to be vertically adjustable relative to the base unit through integrated geometric mechanisms. The base contains vertical slots or guide features, and the feet have corresponding engagement features that allow them to be positioned at multiple height levels and locked in place. This dynamic adjustment capability enables the seat height to be adapted for different children and uses while maintaining structural simplicity.
Solution Approach 2:
The removable foot units serve multiple functions: they provide the stacking interface when attached to the base, they enable height adjustment when positioned at different vertical levels, and they can be completely removed when not needed. This multi-functionality eliminates the need for separate adjustment mechanisms, maintaining device simplicity while providing adaptability.
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 booster seat is stackable without leaning, promotes good posture through the lumbar support, and allows for safe and comfortable seating with adjustable height for children of various ages, enhancing usability and safety.
Implementation Method 1
gravity tends to draw the child away from a safety bump on the molded seat and against the lumbar support
Data Source
AI summary
A stackable plastic booster seat apparatus with a body having a set of four corner cylindrical portions. A right foot having cylindrical portions engages two of the corner cylindrical portions and a left foot engages the other two corner cylindrical portions. The body includes a back with a lumbar support, a seat with a safety bump and a downward and rearward slope such that a child tends to sit properly in the apparatus away from the safety bump and against the lumbar support.