Stroller Wheel Orientation Locking for Stable Upright Folding
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Solution Overview
Problem
Existing child strollers cannot be placed upright in a folded state without tipping over due to wheel sliding and occupying a large storage space when not in use, and existing strollers do not have a mechanism to stabilize the wheels in a folded state, which leads to unstable upright state, and the wheels in a folded state, causing inconvenience in storage and use.
Innovation Solution
A wheel orientation mechanism with a driving part, a locking part, and a dragging part, which locks and unlocks the wheels based on the folding and unfolding actions of the frame, allowing the stroller to stand upright and reduce the wheels to rotate freely, utilizing a locking mechanism, which includes a locking part with a locking pin and hole, and a dragging part connected to the driving part and locking part, to stabilize the stroller in an upright position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the frame is made foldable to reduce storage volume, then storage convenience is improved, but the stroller cannot be placed upright stably in folded state
Solution Approach 1:
The locking pin is preliminarily positioned to engage with the locking hole at a predetermined location on the wheel seat. When the frame is folded, the driving member automatically moves the locking pin into the locking hole before the folding action is complete, ensuring the wheel is locked in advance to enable upright placement.
Solution Approach 2:
The wheel orientation mechanism is automatically activated by the frame's folding and unfolding actions. The triggering part converts the folding motion into driving member movement, which in turn moves the locking pin without requiring manual intervention, making the system self-regulating.
2Ease of operation
If universal wheels are used to facilitate moving and steering, then ease of operation is improved, but the wheels cannot be locked in folded state causing tipping over
Solution Approach 1:
The wheel orientation mechanism dynamically changes the wheel's state based on frame configuration. In the unfolded state, the wheel can rotate freely for easy steering. In the folded state, the locking pin engages with the locking hole to fix the wheel's orientation, preventing tipping over while maintaining the universal wheel design.
3Volume of moving object
If the stroller is folded for storage, then storage space is reduced, but the folded stroller occupies large space when laid flat
Solution Approach 1:
The mechanism preliminarily orients the wheel to a vertical position when the frame is folded, enabling the stroller to stand upright in a compact configuration. This preliminary orientation action transforms the folded state from a flat, space-consuming shape to an upright, space-efficient shape.
Data Source
AI summary
A wheel orientation mechanism, a foldable frame, and a child stroller are provided. The wheel orientation mechanism includes: a driving part including a driving member and a triggering part, the triggering part is actuated by folding and unfolding actions of a frame, such that the driving member moves respectively in a first direction and a second direction opposite to each other; a locking part, the locking part carries out locking and unlocking respectively by movement of the driving member in the first direction and the second direction; and a dragging part including a first end and a second end, the first end is connected to the driving part, and the second end is connected to the locking part. The wheel orientation mechanism may automatically trigger action when the child stroller is in a folded state to rotate the wheel seat to a locked position, such that the child stroller in the folded state may be stably in an upright state, which is convenient for temporary storage.