Vehicle Seat Armrest Retaining Mechanism for Structural Strength
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Solution Overview
Problem
Conventional vehicle seat designs face structural strength issues due to the armrest being connected via a stretching link, which applies a bending load, leading to a low structural strength configuration.
Innovation Solution
A vehicle seat with an extracted position retaining mechanism that includes a rotation shaft, a link member with a long hole, and a pin, allowing the armrest to be retained in a predetermined angle range relative to the vehicle body, even when the backrest angle changes, by sliding the pin along the long hole and rotating the link member to maintain the armrest's extracted position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the armrest is connected via a stretching link to allow extracted position retention, then the armrest can maintain its extracted position, but the structural strength is reduced due to bending load on the stretching link
Solution Approach 1:
The patent introduces a pin as an intermediary element that connects the armrest to the seat back through a long hole in the stretching link. This pin acts as a mediator that transfers forces directly along the longitudinal axis of the stretching link, converting the bending load problem into a direct axial load that the stretching link can handle more efficiently, thereby maintaining structural strength while preserving extracted position retention capability
2Ease of operation
If the armrest is allowed to pivot freely about the support shaft, then the armrest can be extracted and retracted, but the angle variation relative to the vehicle body cannot be limited when the backrest angle changes
Solution Approach 1:
The patent employs a dynamic mechanism where the pin can slide along the long hole in the stretching link. This sliding capability allows the system to adapt to changes in backrest angle dynamically, while the end of the long hole provides a stop that limits the maximum extraction angle. The mechanism automatically adjusts the armrest position to maintain a substantially horizontal orientation relative to the vehicle body regardless of backrest angle variations
Data Source
AI summary
A vehicle seat includes: a seat back configured to be coupled with a vehicle body and to have backrest angle adjustable with respect to the vehicle body; a support shaft that is attached to the seat back and extends in a seat width direction an armrest that is coupled with the seat back to be pivotable about the support shaft and allowed to be pivotally extracted from the seat back to be in an extracted position and retracted to the seat back to be in a retracted position; and an extracted position retaining mechanism that retains the armrest in the extracted position when the armrest is extracted from the seat back to limit an angle of the armrest with respect to the vehicle body to be in a predetermined range while the backrest angle of the seat back is changed.