Jogging Stroller Frame Auto-Swiveling Mechanism
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Solution Overview
Problem
Jogging strollers with larger wheels face difficulties in folding into a compact configuration for storage due to complex assembly requirements and the need for return-springs in existing swiveling mechanisms.
Innovation Solution
A foldable jogging stroller frame with an auto-swiveling mechanism for rear wheel sets that uses swivel sleeve assemblies and connecting elements, allowing for 90-degree swiveling without return-springs, enabling easy conversion between erected and folded configurations through lockable joints and rotating push arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If larger wheels are used in jogging strollers, then the stroller can achieve fast hiking speed, but it becomes difficult to fold into a compact configuration for storage
Solution Approach 1:
The patent applies the dynamics principle by making the rear wheel sets swiveling rather than fixed. The wheels can dynamically change their orientation from a longitudinal position (during use) to a transverse position (during storage), allowing the stroller to maintain both fast hiking capability and compact storage volume through dynamic reconfiguration of the wheel angle
2Volume of moving object
If swiveable real wheels are used to enable compact storage, then the stroller can be folded into a compact configuration, but the mechanism becomes too complex and difficult to assemble
Solution Approach 1:
The patent extracts the return-spring mechanism from the swiveling wheel system. Instead of using return-springs to automatically return the wheels to their longitudinal position, the design uses a simpler geometric constraint system where the swiveling wheels are held in place by the frame structure itself, eliminating the need for complex elastic components and reducing assembly difficulty
Solution Approach 2:
The swiveling mechanism serves itself through the geometric relationship between the frame components. The push arms and rear struts are positioned and dimensioned such that when the push arms rotate during folding, the geometry of the system automatically causes the rear wheels to swivel to the transverse position, eliminating the need for external return-springs or complex control mechanisms
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
Simplifies the folding and unfolding process, reduces manufacturing complexity, and facilitates cost-effective assembly by eliminating the need for return-springs, making it easier for users to manage the stroller's compact storage and use.
Implementation Method 1
the association of the connecting elements shall cause the sleeves and the rear sets to swivel in ninety degrees (90°) from the longitudinally traveling direction to a transversally stowing direction
Implementation Method 2
a pair of push arms pivoted with the front strut by a pair of lockable joints
Implementation Method 3
the pair of push arms shall take the pivot mount as a fulcrum to rotated downward as a labor-saving lever, this shall carry the front strut as well as the seat support rods close to the rear struts
Data Source
AI summary
A foldable jogging stroller frame with an auto-swiveling mechanism for rear wheel sets thereof without return-springs, in which the foldable jogging stroller frame may include a front strut, a pair of push arms pivoted with the front strut by a pair of lockable joints, a pair of rear struts pivoted to the pair of push arms, a seat support rods pivoted between the front strut and the rear struts, and the auto-swiveling mechanism includes at least two sets of swivel sleeve assemblies, a pair of rear sets and a pair of connecting elements. While the pair of push arms is rotating, the association of the connecting elements shall cause the sleeves and the rear sets to swivel in ninety degrees (90°) from the longitudinally traveling direction to a transversally stowing direction thereby achieving a compact configuration for storage.