Vehicle Seatback Extension Bar Anti-Rotation Cover
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Solution Overview
Problem
Related-art vehicle seatbacks have complex structures that are prone to deformation or unexpected rotation due to external forces, which can cause reclining apparatuses to be unexpectedly released.
Innovation Solution
A seatback design featuring a frame with side frames and an extension bar, where a rotatable cover made of low-friction resin is attached to the extension bar, allowing external forces to be dispersed in an upward or downward direction, thereby reducing deformation and rotation of the extension bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bending mechanism is added to suppress rotation of the connection bar, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the anti-rotation function from a complex bending mechanism and implements it through a simple cover structure that rotates along the extension bar, thereby maintaining reliability while reducing device complexity
Solution Approach 2:
Instead of using a complex mechanism to prevent rotation, the patent inverts the approach by allowing rotation of a cover element along the extension bar, which passively suppresses the rotation of the connection bar itself through friction and geometric constraints
2Stability of the object's composition
If a complex bending mechanism is used, then deformation suppression is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent extracts the deformation suppression function from a complex bending mechanism and implements it through a simple cover structure that is easy to manufacture and assemble
Solution Approach 2:
The patent changes the physical state of the cover material to low-friction resin, which allows the cover to rotate smoothly along the extension bar while still providing sufficient friction to suppress unwanted rotation and deformation
3Strength
If the extension bar is made more rigid to resist external force, then strength is improved, but device complexity increases
Solution Approach 1:
The patent introduces a cover as an intermediary element between the external force and the extension bar. This cover rotates along the extension bar, dispersing the external force in upward or downward directions and reducing the rotational moment applied to the extension bar, thereby maintaining strength without increasing structural complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The simple structure effectively suppresses deformation and unexpected rotation of the extension bar, preventing unintended unlocking of reclining apparatuses and maintaining the seatback's adjusted angle.
Implementation Method 1
a cover (7) that is rotatably attached to the extension bar (6) along an outer surface of the extension bar (6)... When an external force is applied to the seat cover, the cover (7) is rotated along the outer surface of the extension bar (6) by the external force
Data Source
AI summary
A seatback for a vehicle seat, the seatback including: a frame to which a pad is mounted, the frame including, a pair of side frames extending along respective side parts of the seatback, and an extension bar extending between the side frames; and a cover that is rotatably attached to the extension bar along an outer surface of the extension bar.