Stroller Accessory Tilting Axis Tandem Configuration
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Solution Overview
Problem
Existing double strollers are either impractical, uncomfortable, or dangerous for transporting two young children due to their large size, poor maneuverability, and difficulty in navigating narrow spaces, as they require substantial reinforcement and have cumbersome folding mechanisms.
Innovation Solution
A stroller accessory that connects reversibly to a single stroller, forming a double stroller with a tilting axis, allowing free tilting between frames, and featuring a control mechanism for blocking rear wheels, enabling easier navigation and safety by allowing the stroller to behave like a caterpillar when crossing obstacles and providing improved rolling blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If double strollers are designed with both children seated side by side, then the width is substantially increased, but this limits the minimum individual width of the installation area for each child and complicates installing infant seats or cradles
Solution Approach 1:
The double stroller is divided into two independent single stroller units, each with its own frame, wheels, and receiving member. This segmentation allows each child to have a full-width installation area equivalent to a single stroller, while maintaining the ability to transport two children simultaneously in tandem configuration.
2Area of moving object
If double strollers are designed with both children in tandem at the same height, then the installation areas are wide and independent, but the frame becomes very long requiring substantial reinforcement
Solution Approach 1:
Instead of creating one long reinforced frame, the invention uses two separate single stroller frames connected together. Each frame maintains its original optimized structure with adequate strength, eliminating the need for substantial reinforcement while achieving tandem seating configuration.
3Strength
If the frame is extended and reinforced to support tandem seating, then the structural strength is improved, but the frame becomes much heavier
Solution Approach 1:
The weight burden is distributed across two separate single stroller frames rather than concentrating all structural requirements in one extended frame. Each frame carries its own portion of the load, resulting in a total weight that is less than a single reinforced frame design.
4Stability of the object's composition
If the wheelbase is increased to support a long frame, then the structural stability is improved, but the maneuverability of the double stroller becomes mediocre
Solution Approach 1:
The double stroller uses two separate wheelbases from the individual single stroller units rather than one extended wheelbase. This segmented wheelbase configuration provides adequate stability for each unit while improving overall maneuverability compared to a single long-wheelbase design.
5Device complexity
If traditional handlebars are used in double strollers, then the structural simplicity is maintained, but the handling becomes difficult due to large width and weight
Solution Approach 1:
A connecting mechanism serves as an intermediary between the two single stroller units, providing a unified control interface that simplifies handling. This connecting mechanism allows the user to control both units simultaneously while maintaining the simplicity of traditional handlebar operation.
6Strength
If reinforcing bars are added to the frame in the front-back direction, then the structural strength is improved, but the folding and unfolding manipulations become complicated
Solution Approach 1:
The folding function is segmented and distributed to each individual single stroller unit rather than requiring a complex unified folding mechanism for the entire double stroller. Each unit can be folded independently using its own simplified folding mechanism, making the overall operation much easier.
7Stability of the object's composition
If the double stroller is designed with fixed rear wheels, then the rolling stability is improved, but the ability to cross sidewalks becomes difficult and dangerous
Solution Approach 1:
The rear wheels are designed to be pivotable rather than fixed, allowing dynamic adjustment between a stable rolling configuration and a lifted configuration for crossing obstacles. This dynamic capability enables the user to tilt the stroller backward to lift front wheels onto sidewalks while maintaining stability during normal operation.
Data Source
AI summary
A stroller accessory connects to a stroller to form a double stroller together and is unusable to transport a child when the accessory is disconnected from the stroller. It includes a frame, a connection mechanism reversibly connecting the accessory to the stroller while defining a tilting axis around which the front part of the accessory frame and the rear of the stroller frame tilt freely relative to one another, two pivoting wheels on a rear part of the frame, a pushing member on the frame rear, a control mechanism controlling a rolling blocking of the double stroller, on the frame front that cooperates mechanically with a rolling blocking system, in the stroller, controlling the blocking system, and an actuating member, on the frame rear to be activated by a user standing behind the double stroller, and which is coupled to the control mechanism so as to actuate the latter.