Storable Vehicle Seat Guide Hole Mechanism
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Solution Overview
Problem
The existing storable vehicle seat mechanisms face issues with smooth rotational movement and stability due to inaccuracies in the installation positions of front and rear links, leading to increased rotational resistance and potential wobbling during use.
Innovation Solution
A storable vehicle seat design featuring a rotational support shaft and guide projection system, where the support shaft is slidably engaged in an elongated hole and guided by a circular arc-shaped hole, with a biaser to ensure smooth movement and stability, allowing the seat to rotate smoothly while maintaining parallel alignment with the floor surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotating path of the seat is determined by a link mechanism configured of front and rear links, then the seat can be rotationally moved with the seat cushion being maintained parallel to the floor surface, but if the accuracy of installation positions of the front and rear links with respect to the seat cushion and the floor surface deteriorates even slightly, the rotational resistance of each hinge mechanism during rotational movement of the seat increases, which makes smooth rotational movement of the seat impossible
Solution Approach 1:
The patent changes the geometric parameters of the guide hole, specifically making it elongated in the forward/rearward direction rather than circular. This parameter change allows the rotational support shaft to move along a controlled path that compensates for installation position inaccuracies, maintaining smooth rotational movement while preserving the parallel orientation of the seat cushion relative to the floor surface.
Solution Approach 2:
The patent introduces dynamic adjustment capability through the elongated guide hole that allows the rotational support shaft to shift position during rotation. This dynamic mechanism compensates for static installation errors, enabling the system to adapt during operation and maintain smooth movement despite manufacturing tolerances.
2Ease of manufacture
If the accuracy of installation positions of the front and rear links deteriorates, then manufacturing and assembly become more flexible, but the rotational resistance increases and smooth rotational movement becomes impossible
Solution Approach 1:
The elongated guide hole geometry is specifically designed to accommodate a range of installation positions. By changing from a fixed circular hole to an elongated rectangular hole, the system accepts greater manufacturing tolerances while maintaining operational performance, thus improving ease of manufacture without sacrificing rotational smoothness.
3Ease of operation
If a link mechanism is used to define the rotational path, then the seat can move smoothly with parallel alignment, but the structure becomes more complex compared to simple hinge mechanisms
Solution Approach 1:
The patent segments the guidance function from the rotation function. The guide hole provides directional guidance while the hinge mechanism provides rotation, allowing each component to be optimized independently. This segmentation maintains parallel alignment capability while using simpler, more modular components.
Data Source
AI summary
A storable vehicle seat is provided, which can be rotationally moved smoothly and can further be prevented from wobbling in a seating state even though the storable vehicle seat has a structure in which the rotational path of the seat is defined by front and rear links.An elongated support hole 52 and a guide hole 53 are formed in a seat cushion frame 50, a rotational support shaft 30 which is rotatably engaged in the elongated support hole 52 to be relatively movable therein and a guide projection 60 which is engaged in the guide hole 53 to be movable therein are projected from an end of the front link 27, and an extension spring S is installed between the rotational support shaft 30 and a locking projection 56 of the seat cushion frame 50 to bias the rotational support shaft 30 rearwardly.