Collapsible Stroller Frame with U-Shaped Sliding Sections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional collapsible baby carriages (strollers) have complex designs with numerous components, leading to time-consuming assembly and high manufacturing costs, often requiring metallic parts and complex mechanisms that are prone to malfunction.
Innovation Solution
A collapsible stroller design featuring a frame composed of only three main components, with injection-molded plastic parts, including a U-shaped upper and lower sliding frame section and a rear frame, allowing for a single movement fold and eliminating the need for separate fasteners and metallic components, and incorporating a simple braking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional designs with numerous individual components are used, then the stroller can achieve functional complexity, but the assembly time and manufacturing cost increase significantly
Solution Approach 1:
The patent merges multiple individual components into integrated units. The frame combines the push frame and base frame into a single structural unit, the wheel assemblies integrate wheels with axles and braking mechanisms, and the seat unit is constructed as a unified component. This merging reduces the total number of parts and eliminates the need for numerous fasteners, directly addressing the contradiction between functional complexity and assembly time.
Solution Approach 2:
The frame is designed as a multi-functional component that simultaneously provides structural support, wheel mounting, and folding mechanisms. The integrated frame performs multiple functions that in conventional designs would require separate components, thereby reducing assembly complexity while maintaining full functionality.
2Device complexity
If conventional designs with numerous individual components are used, then the stroller can achieve functional complexity, but the manufacturing cost increases due to multiple fasteners and metallic parts
Solution Approach 1:
By combining multiple components into integrated units, the patent eliminates the need for numerous screws, rivets, and other fasteners. This merging reduces manufacturing complexity and material costs, as fewer connection elements are required and the design allows for more efficient production processes.
Solution Approach 2:
The patent changes the material parameter from conventional metallic components to plastic materials for the frame and seat unit. This parameter change enables more cost-effective manufacturing through processes like injection molding, reduces the need for expensive metallic fasteners, and simplifies production while maintaining structural integrity.
3Device complexity
If complex mechanisms with numerous components are used, then the stroller can achieve functional capabilities, but the reliability decreases due to more potential failure points
Solution Approach 1:
The patent merges multiple components into integrated units, thereby reducing the total number of joints, connections, and potential failure points. The integrated frame and wheel assemblies have fewer moving parts and connection points, which directly improves reliability by eliminating potential failure sources present in conventional multi-component designs.
4Device complexity
If numerous individual components are used, then the stroller can achieve functional complexity, but the recycling difficulty increases due to mixed materials and assembly complexity
Solution Approach 1:
The patent uses plastic materials uniformly throughout the frame and seat unit construction. This homogeneity of material composition simplifies recycling processes, as the entire structure can be more easily sorted and processed as a single material type rather than requiring separation of mixed metals, plastics, and other materials found in conventional designs.
Solution Approach 2:
By merging components into integrated units with fewer connection points, the patent reduces the complexity of disassembly required for recycling. The simplified structure requires less manual or mechanical separation, making the recycling process more efficient and cost-effective.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a buggy (10) or collapsible perambulator, comprising a sliding frame which, in the unfolded state, runs in an inclined plane and has a division, in the region of which joints (17, 18) are located, and therefore, upon collapsing, an upper portion (11) of the sliding frame is pivotable in relation to a lower portion (12) of the sliding frame about the approximately horizontal axis (21) of said joints, and furthermore comprising an underframe with wheels, wherein, in the collapsed state, the lower portion and upper portion of the sliding frame and at least parts of the underframe are virtually parallel or are at a flat angle to each other and the buggy assumes a flat, compact state, wherein the two sliding-frame portions which are pivotable in relation to each other each have approximately the shape of a U bar. According to the invention, the suspensions of the front wheels (16) are located on the lower portion (12) of the sliding frame, the suspensions for the rear wheels (15) are located on a rear frame (13) of the underframe, said rear frame having an upper horizontal transverse strut (131) which is accommodated in an articulated sleeve (124) so as to be pivotable about a horizontal axis (22) and is located on the lower portion (12) of the sliding frame.