Double Stroller Frame Synchronized Folding via Transverse Linkages
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Solution Overview
Problem
Existing double strollers have complex folding mechanisms and occupy large spaces due to their structure, making them difficult to fold compactly and transport conveniently.
Innovation Solution
A double stroller design featuring a frame with three side supports connected by transverse supports via connecting rod assemblies, allowing for synchronized folding and rotation of side supports, and utilizing four-bar linkages for simplified folding and compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the stroller frame uses a traditional multi-rod structure with complex connection relationships, then the structural strength is improved, but the folding mechanism becomes complex and the folded volume increases
Solution Approach 1:
The stroller frame is segmented into three side supports (first, second, and third) that can be independently folded, with the first and third side supports being foldable toward the second side support. This segmentation allows each component to be compacted separately, reducing the overall folded volume while maintaining structural integrity through the connection mechanisms between segments.
2Stability of the object's composition
If the stroller frame uses more rods with different connection relationships and positions, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The connection mechanisms between side supports are merged into a unified folding system where the first, second, and third side supports are connected through standardized joint structures. This allows multiple components to be connected with simpler, more uniform connection mechanisms rather than complex individual connections, reducing overall device complexity while maintaining stability.
Solution Approach 2:
The side supports are designed with dynamic folding capabilities, allowing the first and third side supports to rotate and fold toward the second side support. This dynamic design enables the structure to transition between stable unfolded and compact folded states, maintaining stability during use while enabling simple folding when needed.
3Strength
If the stroller frame is designed for partial folding only, then the structural integrity is maintained, but the folded volume remains large and portability decreases
Solution Approach 1:
The side supports are designed with dynamic folding capabilities, allowing the first and third side supports to rotate and fold toward the second side support. This dynamic design enables the structure to transition between stable unfolded and compact folded states, maintaining stability during use while enabling simple folding when needed.
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 the double stroller to be folded into a smaller volume, with reduced structure size in both the front-rear and up-down directions, making it easier to carry and transport by allowing all components to be locked and folded together with minimal effort.
Implementation Method 1
the outer connecting rods of the connecting rod assemblies are turned transversely and rotated at the rotating joints of the outer connecting rods and the inner connecting rods
Implementation Method 2
the front wheel support, the rear wheel support, the side armrest and the first connecting rod of each side support form a four-bar linkage
Data Source
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AI summary
The present invention relates to a double stroller, with a frame thereof comprising side supports (100) and transverse supports (200). There are three side supports (100) arranged side by side in sequence, and each two adjacent side supports (100) are connected to each other via one transverse support(200). The transverse supports (200) comprise a plurality of transversely arranged connecting rod assemblies, and each connecting rod assembly comprises an outer connecting rod (201, 203, 205, 207) fixedly connected with the side support (100) on either side of the double stroller, and an inner connecting rod (202, 204, 206, 208) fixedly connected with the side support (100) in the middle of the double stroller. The outer connecting rod is connected to the inner connecting rod in a horizontally rotatable manner, such that the side supports (100) on the left and right sides are capable of rotating inward to draw close to the side support (100) in the middle or rotating outward to unfold along with the outer connecting rods, and when any one of the three side supports (100) is unfolded or folded, the other two side supports (100) are capable of synchronously unfolding or folding under the driving of the transverse supports (200). The outer connecting rods and inner connecting rods connected in a horizontally rotatable manner to enable the side supports (100) on two sides to close together as the outer connecting rods are turned transversely and folded, and thus, after being folded, the space occupied by the double stroller in the left-right direction is lessened.