Foldable Stroller Frame with Slidable Sleeve Linkage
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Solution Overview
Problem
Existing foldable strollers have complex structures and are inconvenient to fold, resulting in bulky and space-consuming designs that hinder user experience and market promotion.
Innovation Solution
A foldable stroller frame with a front wheel bracket, rear wheel bracket, side handrail, rear supporting bar, push bar, slidable sleeve, and additional supporting bars connected via rotatable joints and links, allowing for easy and quick folding and compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing foldable stroller frames use complex structural designs, then structural strength is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The stroller frame is divided into multiple independent linkages including front wheel linkage, rear wheel linkage, handrail linkage, and supporting bar linkage. Each linkage can be independently analyzed and manufactured, reducing overall structural complexity while maintaining strength through modular design
Solution Approach 2:
The frame employs dynamic linkages with rotatable connections that allow the structure to transform between folded and unfolded states. The rotatable connections between linkages enable smooth transitions while maintaining structural integrity during operation
2Strength
If existing foldable stroller frames use complex structural designs, then structural strength is improved, but ease of operation deteriorates
Solution Approach 1:
The frame employs dynamic linkages with rotatable connections that allow the structure to transform between folded and unfolded states. The rotatable connections between linkages enable smooth transitions while maintaining structural integrity during operation
Solution Approach 2:
The linkage structure is designed to fold and unfold automatically through the natural movement of rotatable connections when force is applied to the handrail or wheel brackets, eliminating the need for complex locking mechanisms or manual assembly steps
3Ease of operation
If the stroller is designed to be foldable, then ease of operation is improved, but volume increases when folded
Solution Approach 1:
When folded, the linkages are arranged in a nested configuration where the front wheel linkage, rear wheel linkage, and handrail linkage are positioned within each other's spatial envelope. The rotatable connections allow components to fold inward toward the center, minimizing the overall folded volume for compact storage
4Device complexity
If the stroller frame uses simple structural designs, then device complexity is reduced, but structural strength deteriorates
Solution Approach 1:
The stroller frame is divided into multiple independent linkages including front wheel linkage, rear wheel linkage, handrail linkage, and supporting bar linkage. Each linkage can be independently analyzed and manufactured, reducing overall structural complexity while maintaining strength through modular design
Solution Approach 2:
The frame employs dynamic linkages with rotatable connections that allow the structure to transform between folded and unfolded states. The rotatable connections between linkages enable smooth transitions while maintaining structural integrity during operation
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 stroller frame can be conveniently and quickly folded, reducing volume and enhancing stability when unfolded, thus improving user convenience and market appeal.
Implementation Method 1
a sliding sleeve capable of sliding up and down
Implementation Method 2
a front wheel bracket link, wherein a first end of the front wheel bracket link is rotatably connected to the slidable sleeve, and a second end of the front wheel bracket link is rotatably connected to the front wheel bracket
Data Source
Figure 1
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AI summary
A foldable stroller frame and a foldable stroller are provided. The foldable stroller frame includes: a front wheel bracket (1); a rear wheel bracket (2), rotatably connected to the front wheel bracket (1); a side handrail (3), rotatably connected to an upper end of the rear wheel bracket (2); a rear supporting bar (5), rotatably connected to the rear wheel bracket (2) at a first position of the the rear wheel bracket (2); a push bar (4), rotatably connected to the side handrail (3) and the rear supporting bar (5) by different shafts; a slidable sleeve (8), disposed on the rear wheel bracket (2); a front wheel bracket link (6); and a side handrail link (7). A first end of the front wheel bracket link (6) is rotatably connected to the slidable sleeve (8), and a second end of the front wheel bracket link (6) is rotatably connected to the front wheel bracket (1). A first end of the side handrail link (7) is rotatably connected to the slidable sleeve (8), and a second end of the side handrail link (7) is connected to the side handrail (7).