Pushchair Seat with Foldable Backrest for Compact One-Hand Storage
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Solution Overview
Problem
Existing pushchair systems are complex and inflexible, making it difficult to achieve a compact storage position with simple one-hand operation.
Innovation Solution
A pushchair seat with a foldable backrest that can be rotated to significantly reduce the angle between its sections, allowing for easy conversion from a usage position to a compact storage position, and a detachable design that enables the seat to remain attached to the chassis during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pushchair seat is designed with a foldable backrest that can be rotated to reduce the angle between sections, then the storage position becomes compact and space-efficient, but the device complexity increases due to additional rotatable joints and locking mechanisms
Solution Approach 1:
The backrest is divided into multiple sections (distal section and proximal section) that can rotate independently relative to each other. This segmentation allows each section to be folded separately, achieving compact storage while distributing the mechanical complexity across multiple simple hinge joints rather than requiring a single complex folding mechanism
Solution Approach 2:
The backrest transitions from a static rigid structure to a dynamic multi-position structure through rotatable connections. The distal section can rotate relative to the proximal section about a first axis, and the proximal section can rotate relative to the seating surface about a second axis, enabling the backrest to adapt between usage and storage positions while maintaining structural integrity through controlled rotational degrees of freedom
2Ease of operation
If the pushchair seat remains attached to the chassis during backrest folding, then ease of operation is improved by eliminating detachment steps, but the device complexity increases due to integrated mounting mechanisms
Solution Approach 1:
The pushchair seat is integrally mounted to the pushchair chassis through a bearing connection that allows the seat to remain attached during backrest folding operations. This merging of the seat and chassis mounting functions eliminates the need for separate detachment and reattachment steps, simplifying operation while the bearing mechanism absorbs the additional structural complexity
Solution Approach 2:
The bearing connection serves multiple functions: it mounts the pushchair seat to the chassis, allows the seat to remain fixed during backrest folding, and enables the seat to be rotated relative to the chassis. This multi-functionality improves ease of operation by maintaining continuous attachment while the universal bearing design manages the structural complexity
Data Source
AI summary
A pushchair seat for mounting on a pushchair chassis is comprised of a seating surface and a backrest, wherein the backrest has a distal section and a proximal section which can be rotated relative to the distal section in such a way that the backrest can be folded up from an unfolded backrest usage position into a collapsed backrest storage position.