Stroller Handlebar and Tray Layout to Prevent Tipping
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Solution Overview
Problem
Conventional strollers are prone to toppling when weight is applied to the handlebar due to the handlebar's position relative to the rear wheels, and the presence of armbars and trays can interfere with folding and create hazards.
Innovation Solution
The stroller assembly design includes a handlebar aligned with or inwards of the rear wheels' rotation axis, a telescopic handlebar extender, and a tray assembly with a pivot connector, allowing for improved stability and accessory mounting without interfering with folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handlebar is positioned in a conventional location on the stroller, then the caregiver can easily grip and move the stroller, but the stroller becomes prone to toppling when weight is applied to the handlebar
Solution Approach 1:
The handlebar is repositioned from a conventional lateral position to a position between the rear wheels, utilizing the spatial dimension between the wheels. This dimensional repositioning moves the handlebar closer to the stroller's center of gravity and within the stability triangle formed by the wheels, thereby improving stability while maintaining ease of operation
2Adaptability or versatility
If an armbar and tray are mounted on the stroller for holding child's toys and snacks, then the caregiver can conveniently store items, but the armbar and tray interfere with the folding of the stroller and create safety hazards
Solution Approach 1:
The tray is extracted from the conventional armbar mounting location and repositioned to mount between the rear wheels. This extraction removes the interfering element (armbar with attached tray) from the folding path, eliminating the hazard while preserving the utility of having a tray for storing items
Data Source
AI summary
A stroller assembly can include a stroller frame with a front leg and first and second rear legs. The front leg having at least one front wheel connected thereto. The first and second rear legs have rear wheels connected thereto. The rear wheels are rotatable about a horizontal rotation axis of the rear wheels. The rear wheels are spaced from the at least one front wheel in a rearward direction, with the rearward direction being perpendicular to the horizontal rotation axis. A handle assembly is connected to the front leg and the rear legs. The handle assembly includes a handlebar positioned between the first and second rear wheels. The handlebar is aligned with a vertical axis extending through and perpendicular to the horizontal rotation axis, or offset from the vertical axis such that the handlebar is positioned closer to a center of the stroller frame than the horizontal rotation axis.