Sliding Seat Track Layout for Debris-Protected Wheelchair Access
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Solution Overview
Problem
Existing seating systems in vehicles, designed to accommodate wheelchairs, face issues with debris accumulation in tracks, restricting seat movement when the distance between seats needs to be minimized, as existing solutions with telescoping covers are ineffective for large movement distances.
Innovation Solution
Decoupling tracks for movable seats into separate sets for longer and shorter distances, allowing one set of tracks to be interleaved with another, enabling seats to move closer than the combined length of their covers, thus preventing cover engagement and maintaining track protection without restricting movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If telescoping covers are attached to movable seats to protect tracks from debris, then track protection is improved, but the minimum distance between seats increases due to cover engagement
Solution Approach 1:
The track system is segmented into multiple separate tracks (first track, second track, third track, fourth track) arranged in pairs. Seats are assigned to specific tracks based on their movement distance requirements, allowing independent operation of each track pair without cover interference between adjacent seats on different tracks.
Solution Approach 2:
Fixed covers are introduced as intermediary elements that remain stationary while movable covers slide over them. This telescoping arrangement allows the fixed covers to provide continuous protection while the movable covers only extend beyond fixed covers when seats are in their retracted positions, eliminating the need for excessive spacing between movable seats.
2Area of stationary object
If seats are moved closer together to maximize open space for wheelchairs, then space utilization is improved, but debris accumulation in tracks increases due to restricted movement
Solution Approach 1:
The track system is divided into multiple independent track pairs, allowing seats to be positioned closely together on different tracks while maintaining proper cover protection on each individual track, thus preventing debris accumulation without sacrificing space efficiency.
Solution Approach 2:
Multiple identical track pairs are created with the same cover protection mechanism, allowing the system to achieve close seat spacing while replicating the protective function across all tracks, preventing debris entry into each track independently.
3Reliability
If movable covers are used to protect tracks, then debris prevention is improved, but seat movement distance is restricted when covers engage with each other
Solution Approach 1:
Seats requiring large movement distances are assigned to one set of tracks while seats with smaller movement requirements use another set of tracks. This segmentation allows each track pair to be optimized for its specific movement requirements without cover engagement restrictions.
Solution Approach 2:
Fixed covers serve as stationary intermediaries that extend beyond the retracted position of movable seats. Movable covers slide over these fixed covers, allowing seats to move to their forward positions without the movable covers engaging with each other, thus enabling full movement distance while maintaining protection.
Data Source
AI summary
A vehicle has an area capable of seating ambulatory passengers and alternatively receiving a mobility aid, such as a wheelchair. The area provides tracks for mounting at least two movable seats that can be moved to provide space in the area for the mobility aid. The tracks are provided with track covers that reduce maintenance requirements by preventing entry of debris. One of the seats is configured to move further than the other whereby the spacing between the seats after moving to accommodate a mobility aid is less than the spacing of the seats when used by ambulatory passengers. The seat configured to move further has a longer track cover, but the tracks are laterally spaced to avoid engagement between the track covers of the two seats whereby they can be moved to be spaced from each other by a distance less than the length of either of the track covers.