Stroller Assistant Wheel for Folded Standing and Dragging
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Solution Overview
Problem
Conventional strollers are inconvenient to carry and drag when folded, as they require users to stoop and are often too large due to the need for the front-wheel assembly to unfold forward, making them difficult to maneuver and store.
Innovation Solution
A foldable stroller design with an assistant wheel that pivots to contact the ground when the stroller is folded, allowing it to stand and reducing the size, combined with an operating mechanism for reliable folding and a frame configuration that includes a handrail, seat, and stretchable handle to facilitate easy handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the front-wheel assembly is folded together to reduce size, then the stroller size is reduced, but the stroller is unable to stand so that it is extremely inconvenient for users to carry
Solution Approach 1:
An assistant wheel is introduced as an intermediary component to enable the stroller to stand upright when folded. The assistant wheel acts as a mediator between the folded stroller structure and the ground, providing the necessary support point for vertical positioning without requiring the front-wheel assembly to remain extended.
Solution Approach 2:
The wheel support function is segmented between the main front-wheel assembly and the auxiliary assistant wheel. The assistant wheel handles the specific function of providing ground contact for standing when folded, while the main front-wheel assembly can be fully folded without compromising the standing capability. This functional segmentation resolves the contradiction between compact folding and carry convenience.
2Ease of operation
If the front-wheel assembly is unfolded forward to maintain standing capability, then the stroller can stand after being folded, but the stroller is too big to drag for users
Solution Approach 1:
The assistant wheel serves as a mediator that eliminates the need for the front-wheel assembly to remain unfolded for standing support. By providing an alternative ground contact point closer to the rear of the stroller, the assistant wheel enables vertical positioning while allowing the front-wheel assembly to be folded compactly, thereby reducing the overall length and improving draggability.
3Device complexity
If the stroller is designed to be disposed on the ground after being folded, then the structure is simple, but users have to stoop to take the strollers
Solution Approach 1:
The assistant wheel acts as a mediator between the folded stroller and the ground, enabling the stroller to stand upright independently. This simple mechanical addition allows the stroller to maintain a vertical position when folded, eliminating the need for users to stoop and pick it up from ground level, while adding minimal structural complexity to the overall design.
Data Source
AI summary
The present invention discloses a stroller including a foldable stroller skeleton, a front-wheel assembly and a rear-wheel assembly installed on the foldable stroller skeleton, a frame pivotally connected to the foldable stroller skeleton and an assistant wheel pivotally connected to the frame for being capable of contacting a ground by cooperating with the rear-wheel assembly as the frame approaches the rear-wheel assembly by rendering the foldable stroller skeleton folded. The stroller can be in a standing state so as to facilitate users to carry after being folded. The assistant wheel is rolling as the stroller is dragged so that users can save more effort to drag the stroller. The stroller is standing by the assistant wheel and the rear-wheel assembly, instead of the front-wheel assembly and the rear-wheel assembly.