Folding Seat Footrest Rack With Hinged X-Frame Stability
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Solution Overview
Problem
Existing folding seats with integrated footrests often compromise safety and stability due to restricted height and length of support frames, poor balance, and reliance on pull cords, which can lead to tripping and instability.
Innovation Solution
A footrest rack design featuring intersected and hinged landing rods with universal joints, allowing for flexible folding and extension, and a leaf spring for stability, ensuring the footrest shell fabric is securely attached to the folding seat, enabling both feet to be supported and preventing unwanted movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the support frame and connecting bracket are turned under the seat integrally, then the footrest can be stored compactly, but the heights and lengths are restricted and cannot support both feet
Solution Approach 1:
The footrest structure is divided into separate components: the support frame with support rods can be independently folded and stored, while the connecting bracket remains attached to the seat. This segmentation allows the support rods to be sufficiently long for foot support while still achieving compact storage when folded against the seat frame.
2Device complexity
If the footrest surface is supported by only two support tubes, then the structure is simple, but the stability is poor and unwanted movement or overturning can occur
Solution Approach 1:
The connecting bracket is designed with an asymmetric X-shaped configuration where the intersection point is offset from the center. This asymmetric design creates a wider base of support and better weight distribution, significantly improving stability while maintaining structural simplicity. The offset intersection point prevents the footrest from easily tipping over.
3Ease of manufacture
If the support frame is associated with the connecting bracket through a pull cord, then assembly is simple, but stability remains poor
Solution Approach 1:
The support frame and connecting bracket are merged into a single integrated structure where the support rods are directly connected to the bracket through rigid joints. This elimination of the pull cord connection provides inherent structural stability while maintaining ease of assembly through simple attachment mechanisms.
4Ease of operation
If the footrest rack occupies the space in front of the seat, then it provides foot support, but it creates tripping hazards and poor safety
Solution Approach 1:
The footrest rack is designed as a dynamic structure that can be quickly folded and deployed. When not in use, it folds compactly against the seat frame, clearing the ground space and eliminating tripping hazards. When needed, it can be rapidly extended to provide foot support, making the safety improvement practical rather than compromising functionality.
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 enhances safety and stability by allowing the footrest to be folded compactly without occupying space, ensuring users can sit or lie comfortably without tripping hazards, and supports both feet effectively, accommodating various folding seat configurations.
Implementation Method 1
The other end of the landing rod is mutually hinged with one end of the support rod through a universal joint, and the support rods can be turned over inwardly or outwardly along with the landing rods with the help of the universal joints.
Implementation Method 2
A leaf spring is fixed on the support rod close to the hinge point. The leaf spring can abut against the hinge piece or the ground surface when the landing rods are turned inwards in place, so that the trending that the support rods are close to the front vertical face of the folding seat is kept.
Data Source
AI summary
The present invention relates to a matched footrest rack for a folding seat, which comprises a pair of landing rods intersected and hinged together as well as a pair of support rods intersected and hinged together. The matched footrest rack for a folding seat is characterized in that one end of each of the two landing rods is hinged at two landing legs corresponding to a front vertical face of the folding seat. The two landing rods can be turned over towards the inner side or the outer side of the front vertical face of the folding seat synchronously with the help of a hinge point so as to form a folding or opening state. The footrest rack has the characteristics of being extended in the deployed position for support and compact when the footrest rack is folded.