Foldable Stroller U-Shaped Support and Damping Mechanism
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Solution Overview
Problem
Conventional strollers lack a compact and efficient folding mechanism that allows for easy carrying and storage, and their seat assemblies are often rigidly attached, making them difficult to change or store.
Innovation Solution
A foldable stroller design featuring a U-shaped support member with damping means, pivotally connected to a base frame and push bars, allowing for a compact configuration with a locking mechanism and detachable seat assembly that can be easily changed and stored, incorporating a flexible seat with adjustable recline functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the stroller is designed with a rigid frame structure to ensure stability and support, then the structural strength is improved, but the ability to fold compactly for carrying and storage deteriorates
Solution Approach 1:
The frame is divided into multiple segments including push bar members with upper and lower portions, support members with U-shaped configurations, and base frame sections that can pivot relative to each other. This segmentation allows the rigid frame to be folded into a compact configuration while maintaining structural integrity during use
Solution Approach 2:
The frame incorporates dynamic elements such as pivoting push bar members, hinged support members, and rotating wheel assemblies that transition between fixed rigid positions during use and folded positions for storage. The locking mechanism enables the dynamic structure to maintain rigid positions when needed
2Stability of the object's composition
If the seat assembly is rigidly attached to the frame to ensure stability during use, then the stability is improved, but the ease of removing and replacing the seat deteriorates
Solution Approach 1:
The seat assembly is attached to the frame through a dynamic attachment mechanism that provides stable connection during use but allows easy release when needed. The attachment system transitions between locked and unlocked states, enabling both stability and ease of replacement
3Productivity
If the push bars are positioned far from the base frame to provide leverage for pushing, then the pushing efficiency is improved, but the compactness in folded position deteriorates
Solution Approach 1:
The push bar assembly is segmented into upper and lower portions that can pivot independently. The lower push bar member remains close to the base frame for compact folding, while the upper portion extends to provide leverage. The pivot connection between segments allows the structure to achieve both compact folded size and extended pushing leverage
Solution Approach 2:
The push bar members utilize angular positioning and multi-axis pivoting to achieve leverage without increasing linear distance from the base frame. By operating in multiple dimensions through hinged connections, the system provides pushing efficiency while maintaining compact folded configuration
4Object-affected harmful factors
If the stroller includes damping means to reduce vibration and improve comfort, then the comfort is improved, but the device complexity increases
Solution Approach 1:
The damping function is merged with existing structural components such as the support members and push bar connections. The damping means are integrated into the frame structure rather than being separate additions, reducing overall system complexity while providing vibration reduction
Solution Approach 2:
The damping characteristics are achieved by selecting materials and geometric configurations with appropriate damping properties. By adjusting parameters such as material selection, cross-sectional geometry, and connection stiffness, the system provides vibration reduction through inherent material and structural properties rather than complex active damping systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables a compact, safe, and versatile stroller that can be easily folded and carried, with a flexible seat assembly that can be quickly changed, addressing the need for a product that is both practical for daily use and adaptable for different situations.
Implementation Method 1
the damping means comprises at least one rubber member arranged between the support member and the base frame
Implementation Method 2
The resilient rubber tube provided on the support member then provides the damping to the push bar members
Implementation Method 3
the damping means comprise a spring member, wherein the spring member is preferably arranged between the support member and the upper half of the base frame for increasing the working distance of the spring member
Data Source
Figure 1~3
Figure 4~6
Figure 7~8C
AI summary
A stroller, movable between an open position wherein the stroller can be locked and a folded position, comprising front wheels and rear wheels, a generally planar base frame (2) extending substantially between said front and rear wheels, two push bars (3) pivotally connected to the base frame by a front hinge (4) substantially located near the front wheels, which push bars extend substantially upwards and backwards in the open position, wherein the stroller further comprises a support member (9) extending substantially upwardly in the open position between an intermediate location of the base frame and an intermediate location of the push bars and pivotally connected therewith at both ends, and wherein the support member is substantially U-shaped and includes a base and two legs connected to two end of the base, wherein the base of the U-shape is pivotally connected to the base frame and the extremities of the respective legs of the U-shape are pivotally connected to the push bars.