Child Seat Frame Locking Structure for Compact Stroller Folding
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Solution Overview
Problem
Current strollers that offer multiple seating modes for children do not fold to a compact size suitable for easy transportation, and those that can fold compactly often lack features and have small wheels, making them unsuitable for handling uneven terrain.
Innovation Solution
A compact collapsible stroller design where the child seat frame can be attached to the main stroller frame in multiple configurations, folding in two steps with the seat frame releasing to pivot vertically, allowing it to be stored within the main frame's folding boundary, and featuring a child tray that pivots during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stroller is designed to offer multiple seating modes for the child, then the adaptability is improved, but the device complexity increases and the folding size becomes too large for easy transportation
Solution Approach 1:
The child seat frame is divided into separate components (seat unit, tray, backrest) that can independently fold and collapse. The seat frame includes a seat pan, backrest, and tray that can be segmented for compact storage while maintaining multiple seating configurations when assembled
Solution Approach 2:
The child seat frame components are designed to nest within each other during folding. The tray folds into the seat pan, the backrest collapses into the seat frame, creating a compact nested structure that reduces overall volume while preserving the ability to reconstruct multiple seating modes
2Ease of operation
If the stroller is designed to fold to a compact size, then the ease of operation is improved, but the device complexity increases and features are reduced
Solution Approach 1:
The stroller incorporates dynamic folding mechanisms with movable joints and articulation points that allow smooth transitions between extended and compact states. The seat frame includes pivot points and hinge mechanisms that enable easy folding operations while maintaining structural integrity and multiple configuration options
Solution Approach 2:
Folding linkages and connection elements serve as intermediaries between the various frame components. These intermediaries facilitate the folding motion while maintaining the structural relationships needed for multiple seating modes, reducing the complexity of direct connections
3Volume of moving object
If the stroller has small wheels for compact folding, then the volume is reduced, but the ability to handle uneven terrain deteriorates
Solution Approach 1:
The wheel assembly is segmented from the main frame, allowing independent optimization of wheel size for terrain handling while maintaining compact overall folding dimensions. The separable wheel design enables larger wheels to be used without increasing the folded volume of the main structure
Data Source
AI summary
Disclosed are a child seat frame and a compact collapsible stroller. The child seat frame includes a seat mounting part, a lower frame body, and an upper frame body. The upper frame body is provided with an upper frame body lock which can be actuated to lock and disengage from a second latch part, and the upper frame body is pivotable relative to a lower seat frame hub when the upper frame body lock is disengaged from the lower seat frame hub; and when the lower frame body pivots relative to the seat mounting part, the upper frame body lock locks over the second latch part. The child seat frame can be folded in a main suitable for the folding boundary dimensions of a main stroller frame, thereby maintaining the folding dimensions of a stroller unit to a minimum.