Booster Seat Front-Edge Strap to Eliminate Chair Ledge Gap

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Solution Overview

Problem

Existing booster seats often result in discomfort for children due to the exposed ledge between the booster seat and the adult chair, causing calves to rest against the chair's front edge.

Innovation Solution

A booster seat design incorporating a forward edge strap that runs from the seat's front face under the chair, securely connected to either the horizontal seat straps, backrest straps, or the booster seat's edges, to maintain optimal positioning and prevent slippage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If backrest straps are used to secure the booster seat, then the booster seat is firmly held against the backrest, but the booster seat is recessed back from the front edge of the adult chair creating an exposed ledge

Engineering Contradiction:

Improvebooster seat stabilityVSAvoidchild discomfort from exposed ledge

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The securing system is divided into two independent strap components: backrest straps for preventing forward slippage and forward edge straps for preventing backward motion. This segmentation allows each strap to perform its specific function without compromising the other, enabling the booster seat to be positioned at the front edge while maintaining stability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The forward edge strap acts as an intermediary element that connects the booster seat to the adult chair's front edge area. By introducing this intermediate securing mechanism, the booster seat can be pulled forward to eliminate the exposed ledge while the backrest straps continue to provide backward support.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the booster seat is pulled firmly against the backrest for effective tension, then secure placement is achieved, but the exposed ledge between the booster seat and chair front edge increases

Engineering Contradiction:

Improvesecure placementVSAvoidexposed ledge length

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The strap system incorporates adjustable mechanisms that allow dynamic positioning of the booster seat. The forward edge strap can be adjusted to pull the seat forward to the optimal position, while the backrest straps can be independently adjusted to maintain proper tension. This dynamic adjustability enables simultaneous achievement of secure placement and minimal exposed ledge.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If forward edge strap is added to counteract backward motion, then optimal positioning at front edge is achieved, but device complexity increases

Engineering Contradiction:

Improvechild comfort and leg positionVSAvoidstrap arrangement complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The forward edge strap and horizontal seat straps are integrated into a unified securing system with coordinated adjustment mechanisms. The straps work together as a combined system where the forward edge strap prevents backward motion while the horizontal straps provide lateral support, creating a comprehensive securing solution that manages complexity through functional integration.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250151925A1Strap arrangement for securing booster seat near front edge of adult chair

Publication Date: 2025.05.15 NUVATE INC

AI summary

A booster seat includes a horizontal strap that passes beneath the seat of the chair and a backrest strap that passes around the backrest of the chair to inhibit forward movement. A front edge strap is secured to the forward edge of the booster seat and passes beneath the chair seat to be secured to one of the straps or the booster seat to inhibit rearward movement and maintain the booster seat aligned with the forward edge of the chair.