Foldable Baby Stroller Linkage for Jam-Free Folding

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Solution Overview

Problem

Existing baby strollers suffer from jamming due to interference between moving parts during folding, cumbersome folding processes, accidental buckle release, and poor structural stability, compromising convenience and safety.

Innovation Solution

A foldable baby stroller design featuring a folding bottom plate, side frames, and vertical frames with synchronized rods and latches that allow smooth folding operations, preventing accidental unlocking and ensuring stability through a linkage mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional folding mechanisms are used, then the stroller can be folded, but moving parts interfere with each other causing jamming

Engineering Contradiction:
Improvefolding operationVSAvoidjamming prevention
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The folding mechanism is divided into independent folding rods and folding connection pieces. Each folding rod can move independently along its path, and the connection pieces are designed with separate locking and unlocking mechanisms. This segmentation prevents interference between moving parts and eliminates jamming while maintaining smooth folding operation.

Inventive Principle:
Principle #1Segmentation

2Reliability

If traditional buckle designs are used, then the structure can be locked, but accidental release or difficult unlatching occurs

Engineering Contradiction:
Improvelocking stabilityVSAvoidunlatching ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The locking function is extracted from the buckle and integrated into the folding connection pieces. The locking mechanism uses the geometric shape of the folding rod and connection piece to automatically lock when folded, and a separate unlocking mechanism is provided for easy manual release. This separation of locking and buckling functions eliminates accidental release while maintaining easy unlatching.

Inventive Principle:
Principle #2Taking out (Extraction)

3Volume of moving object

If the folded structure is made compact, then portability is improved, but structural stability deteriorates

Engineering Contradiction:
Improvefolded sizeVSAvoidstructural stability
Core Design Contradiction:
Volume of moving objectVSStability of the object's composition

Solution Approach 1:

The stabilizing rod is preliminarily positioned between the two supports during the folding process. As the folding rod moves and the bottom plate main bodies fold together, the stabilizing rod automatically engages to maintain structural stability. This preliminary positioning ensures that even in the compact folded state, the stroller maintains sufficient stability for safe use.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12479491B1Foldable baby stroller
Publication Date: 2025.11.25 SHENZHEN BAITU NETWORK CO LTD
  • US12479491B1 patent drawing
  • US12479491B1 patent drawing
  • US12479491B1 patent drawing

AI summary

A foldable baby stroller includes a baby stroller main body, and the baby stroller main body includes a folding bottom plate; the baby stroller features convenient and efficient folding operation. By pressing the unlocking part of the latch, the locking of the telescopic rods can be quickly released by using the lever principle. When locking, it only needs to press the locking part to complete. During the folding process, the movement paths of the folding bottom plate and the folding side frame do not interfere with each other. The folding bottom plate realizes flipping and closing through the hinge connection piece, and the folding side frame adapts to the elevation of the middle connection piece by extracting the sleeve rod from the sleeve. The two work together smoothly. The supporting vertical frame remains fixed and moves closer with the stroller.