Multi-fold child carriage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing strollers face challenges in achieving a compact fold size due to the presence of a push handle that occupies space, limiting their storage convenience.
Innovation Solution
A child carriage design devoid of a push handle above the child carrier, featuring a frame with pivotable leg assemblies and crosspieces that allow for multiple folding configurations, enabling compact storage without a handle, and incorporating removable child carriers with couplers for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a push handle is included in the stroller frame, then the stroller can be pushed easily, but the folded volume increases and storage becomes difficult
Solution Approach 1:
The patent removes the traditional push handle from the stroller frame and relocates the pushing function to the child carrier itself. The child carrier includes an integrated handle that extends upward, allowing the user to push the stroller by gripping the carrier's handle rather than a separate frame handle. This extraction of the handle function from the frame resolves the contradiction by eliminating the structural requirement for a frame-extended handle while maintaining pushing capability.
Solution Approach 2:
The child carrier is designed with multi-functionality, serving both as the container for the child and as the push handle for the entire stroller system. The carrier's handle structure is dual-purpose: it supports the child's weight and provides the pushing interface for the user. This multi-functionality eliminates the need for a separate frame handle, enabling compact folding while maintaining ease of operation.
2Ease of operation
If the frame is designed with a traditional push handle structure, then pushing is convenient, but storage in vehicles and small spaces becomes problematic
Solution Approach 1:
The patent extracts the handle function from the frame structure and assigns it to the child carrier. This allows the frame to be designed without the structural extensions needed for traditional handles, enabling the frame to fold into a compact configuration that fits easily into vehicle trunks and small storage spaces while the carrier's handle maintains pushing convenience.
Solution Approach 2:
The stroller employs dynamic folding mechanisms with multiple pivot points that allow the frame to transition between expanded and compact configurations. The leg assemblies and crosspieces can pivot relative to each other, enabling the frame to collapse into a small volume for storage while maintaining its functional shape during use. This dynamic adaptability resolves the contradiction between pushing convenience and storage adaptability.
3Stability of the object's composition
If the frame includes structural elements for a push handle, then the stroller is stable during use, but the folded size is too large for compact storage
Solution Approach 1:
The patent removes the handle-structural elements from the frame, allowing the frame to be designed with fewer structural extensions. This enables the frame legs and crosspieces to be positioned closer together and folded more compactly while the child carrier's handle provides the necessary pushing function. The frame stability is maintained through the leg assembly geometry and pivot connections rather than handle structure.
Solution Approach 2:
The stroller is segmented into distinct functional components: the frame provides support and mobility with its leg assemblies and wheels, while the child carrier provides the pushing interface through its integrated handle. This segmentation allows each component to be optimized independently - the frame for compact folding and the carrier for pushing functionality - resolving the contradiction between frame stability and folded size.
Data Source
AI summary
In one example, a child carriage has a frame with wheels. The frame has a coupler that removably couples the child carriage to a child carrier, such as a seat or bassinet. The frame has first and second leg assemblies, each having a front leg and a rear leg that are pivotably coupled about a first axis. The first crosspiece extends between the front legs of the first and second leg assemblies, and the second crosspiece extends between the rear legs of the first and second leg assemblies. The carriage is devoid of any push handle that extends above the child carrier. The frame folds about (i) the first axis from an expanded configuration to a first folded configuration so as to align hinges of the first and second crosspieces along a second axis, and (ii) the second axis from the first folded configuration to a second folded configuration.