Vehicle Seat Backrest Fitting Anti-Collision Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle seat designs face distortion and potential damage during forward-pivoting of the backrest due to stops colliding, particularly when using the free-pivoting function, which requires additional costly components like rotary encoders and microswitches to prevent such collisions.
Innovation Solution
The backrest-side fitting part is reset by a predetermined angle opposite to the swivel direction when the locking mechanism is actuated for folding, ensuring the stops are moved away from each other, preventing collision and distortion without the need for additional components like rotary encoders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backrest is freely pivoted forward into a folded position using the free-pivoting function, then access to rear seats is improved, but the stops may collide causing distortion and potential damage to the fitting components
Solution Approach 1:
The control means detects when the locking mechanism is actuated to enable free-pivoting function, and proactively prevents stop collision by resetting the rotary fitting mechanism to a safe position before the backrest is fully folded forward. This preliminary action occurs at the moment the locking mechanism changes state, ensuring the stops are positioned to avoid collision during subsequent forward pivoting motion.
2Reliability
If additional components like rotary encoders and microswitches are added to prevent stop collisions, then component protection is improved, but manufacturing cost increases
Solution Approach 1:
The control means utilizes information already available from the locking mechanism's actuation state to automatically manage the rotary fitting mechanism's position. The system serves itself by detecting when free-pivoting mode is activated and autonomously adjusting the mechanism to prevent stop collision, eliminating the need for additional expensive sensing components like rotary encoders or microswitches.
3Reliability
If the rotary fitting mechanism is reset by a predetermined angle opposite to the swivel direction when the locking mechanism is actuated, then stop collision is prevented, but the mechanism undergoes additional movement cycles
Solution Approach 1:
The control means applies a counteracting movement to the rotary fitting mechanism by resetting it a predetermined angle opposite to the swivel direction when the locking mechanism is actuated. This preliminary anti-action positions the stops to avoid collision during the subsequent forward pivoting of the backrest, preventing the harmful effect before it can occur.
Data Source
AI summary
A vehicle seat with a seat part, a backrest and a fitting which pivotally connects the backrest with the seat part. The fitting includes a backrest-side fitting part coupled with the backrest via a locking mechanism, and a rotary fitting mechanism. A driving device is arranged on the backrest for driving the rotary fitting mechanism. In a locking position, the locking mechanism firmly couples the backrest-side fitting part with the backrest, and in a free-pivoting position decouples the backrest-side fitting part from the backrest, so that the backrest is pivotable into a folded position in a swivel direction about the swivel axis. The driving device is formed to actuate the rotary fitting mechanism for pivoting the backrest-side fitting part by a predetermined angle against the swivel direction, when the locking mechanism is actuated for pivoting the backrest into the folded position.