Infant Stroller Foldable Frame with Nested Linkage
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Solution Overview
Problem
Existing infant strollers often require cumbersome detachment of the seat for collapsing and do not compact sufficiently, leading to increased storage space requirements.
Innovation Solution
The infant stroller apparatus features a foldable structure with a handle frame, front leg frame, and rear leg frame, where the handle frame can be rotated to unlock pivot joints, allowing the stroller to collapse with the seat mounted, utilizing bar linkages and a release mechanism to facilitate compact folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the seat is detached before collapsing the stroller frame, then the collapsing operation becomes simpler, but additional storage space is required for the detached seat
Solution Approach 1:
The patent merges the seat assembly with the stroller frame by providing a mounting structure that allows the seat to remain attached during collapse. The seat assembly includes a seat pan, backrest, and mounting brackets that integrate with the frame's longitudinal members, enabling the seat to move with the frame during folding operations without requiring separate storage.
2Area of stationary object
If the seat assembly allows collapse with the seat mounted, then storage space is reduced, but the collapsed size is still not as small as desired
Solution Approach 1:
The patent implements a nested folding structure where the handle frame folds inward toward the seat assembly, and the rear leg frame folds toward the front leg frame. The longitudinal members are arranged to nest within each other during collapse, with the seat assembly positioned to allow the frame members to fold closely together, minimizing the overall collapsed volume.
Solution Approach 2:
The patent utilizes multi-dimensional folding by providing pivot joints at multiple locations and orientations. The handle frame pivots relative to the seat assembly, the rear leg frame pivots relative to the front leg frame, and longitudinal members pivot relative to each other, creating a complex three-dimensional collapse sequence that achieves compact dimensions in all directions.
3Ease of operation
If the handle frame is rotated to unlock pivot joints for collapsing, then the folding operation becomes more convenient, but the mechanism complexity increases
Solution Approach 1:
The patent incorporates a release mechanism that performs preliminary unlocking action before the actual folding operation. The release mechanism includes a trigger or button that disengages locking elements at the pivot joints in advance, allowing the frame to be folded without manual manipulation of multiple locked joints, thereby simplifying the user operation despite the underlying mechanical complexity.
Data Source
AI summary
An infant stroller apparatus includes a front leg frame, a rear leg frame and a handle frame. The front leg frame has a first side portion fixedly connected with a first stop abutment. The rear leg frame has a second side portion having a protrusion. The handle frame has a side segment fixedly connected with a second stop abutment, the first and second side portions and the side segment being pivotally connected with one another about a common first pivot axis. The protrusion is restrictedly positioned between the first and second stop abutments when the infant stroller apparatus is in a deployed state.