Mobility Seat Cushion Tilt-Slide Mechanism for Stable Posture
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Solution Overview
Problem
Existing seat adjustment systems in mobility vehicles, particularly in rear seats with limited space, restrict the range of tilting functions, leading to uncomfortable seating postures due to changes in seating height during tilting.
Innovation Solution
A seat adjustment apparatus that includes a fixing bracket, a setting bracket connected to a rotatable back frame, a guide unit, and a drive unit. This apparatus allows the seat cushion to slide forward or rearward while tilting upward or downward, enhancing seating convenience by enabling stable postures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tilting device tilts the entire seat, then the seat cushion angle is adjusted, but the occupant's lower body and buttocks are entirely moved causing seating height to change and creating uncomfortable seating posture
Solution Approach 1:
The seat adjustment device is divided into independent adjustment components: a seat cushion angle adjustment mechanism that tilts only the seat cushion relative to the seat pan, separate from the seat pan position. This segmentation allows the seat cushion angle to be adjusted without moving the occupant's lower body, maintaining seating height and comfort while providing angle adaptability.
2Volume of moving object
If the rear seat has a narrower space, then the structure is compact, but the range of the tilting function is limited restricting seat position adjustment
Solution Approach 1:
The invention adds a vertical dimension to the adjustment mechanism by allowing the seat cushion to tilt and slide upward or downward relative to the seat pan. This multi-dimensional movement (combining tilting and vertical sliding) expands the adjustment range without requiring additional horizontal space, resolving the contradiction between compact structure and adjustment versatility.
3Device complexity
If only the angle of the seat cushion can be changed, then the structure is simple, but there is a limitation in providing convenience that allows the occupant to take various postures
Solution Approach 1:
The invention merges two functions into a single integrated mechanism: the seat cushion angle adjustment and the seat cushion vertical positioning. The guide unit enables the seat cushion to both tilt and slide vertically in conjunction, providing multiple posture adjustments without requiring separate complex mechanisms for each function, thus maintaining simplicity while enhancing versatility.
Data Source
AI summary
Disclosed is a seat adjustment apparatus for a mobility vehicle, in which a seat cushion slides in a forward/rearward direction while moving upward or downward when the seat cushion is tilted, thereby allowing an occupant to take a stable posture. In one aspect, the seat apparatus comprises 1) a fixing bracket fixed to a floor surface; 2) a setting bracket disposed above the fixing bracket and connected to a back frame so that the back frame is rotatable; 3) a guide unit disposed at a front end of the fixing bracket and a front end of the setting bracket; 4) a guide part disposed at a rear end of the fixing bracket and a rear end of the setting bracket; and 5) a drive unit connected to the guide unit.