Vehicle Seat Lever Differentiation via Access Direction
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Solution Overview
Problem
Occupants often struggle to distinguish between multiple levers for different movements of a vehicle seat, leading to confusion when trying to operate the correct lever for reclining, sliding, or rotating the seat.
Innovation Solution
The vehicle seat operating device features distinctively positioned and oriented operating levers, with specific access directions for each lever, such as the reclining lever accessible from the side and the sliding/rotating lever accessible from the front, and additional design features like recesses and chamfers to enhance differentiation and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple operating levers are provided for different seat movements, then the seat functionality is improved, but the ease of operation deteriorates due to difficulty in distinguishing between levers
Solution Approach 1:
Each operating lever is given a distinct local quality through its unique access direction. The first lever is accessible from the side of the seat, the second from the front, and the third from the rear, creating differentiated tactile and spatial characteristics that enable easy identification without visual confirmation.
Solution Approach 2:
The patent introduces a new dimension for lever differentiation by using access direction (spatial orientation) rather than relying on lever position, shape, or size. This dimensional approach allows multiple levers to be clearly distinguished even when positioned close together on the seat side surface.
2Device complexity
If levers are positioned close together on the seat side surface, then the device complexity is reduced, but the ease of operation worsens due to difficulty in accessing and identifying individual levers
Solution Approach 1:
The patent resolves the conflict between compact lever arrangement and ease of access by transitioning from planar differentiation (position, shape) to spatial differentiation (access direction). This allows levers to be closely positioned on the seat side surface while maintaining distinct access paths from different directions.
Solution Approach 2:
The access space around the levers is segmented into distinct directional zones (side access, front access, rear access), allowing each lever to be independently accessed from its designated direction without interference from adjacent levers, even when closely positioned.
Data Source
AI summary
A vehicle seat operating device has a reclining lever, a lifting lever and a getting in/out support lever for rotating a vehicle seat in a horizontal plane. A reclining lever operation surface and a lifting lever underside operation surface are accessible from a side of the seat. The getting in/out support lever has a recess section which is formed toward the front, and an operation surface which is a ceiling surface of the recess is accessible from the front. Side access to the operation surface is blocked by an out sidewall located on a seat width direction outer side of the operation surface. The getting in/out support lever is easily distinguished from the other two levers because accessible directions are different.