Vehicle Headrest Support Structure with Tubular Collars
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Solution Overview
Problem
The existing headrest support structures in vehicle seats, with U-shaped openings, are prone to significant tilting and deformation when subjected to large rearward forces, such as during a vehicle collision, due to the bending and deformation of the sleeves that hold the headrest's rod-shaped leg portions.
Innovation Solution
A headrest support structure featuring a U-shaped sleeve support part with tubular collars between the upper and lower walls, which provide high bending and compression rigidity, minimizing deformation and preventing the headrest from tilting rearward by maintaining the vertical distance between the upper and lower walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a U-shaped sleeve support part with concentric holes and inserted sleeves is used to accommodate various units in the rear seat space, then the space utilization is improved, but the structural rigidity deteriorates causing the sleeves to tilt and deform under rearward force
Solution Approach 1:
The invention uses a composite structure combining the U-shaped sleeve support part made from panel frame material with reinforced collar members that have high bending rigidity. The collar members are positioned at critical locations to strengthen the support part without compromising the U-shape configuration, creating a composite structural system that maintains both space accommodation capability and structural strength under load.
2Adaptability or versatility
If the U-shaped opening is maintained to accommodate various units, then the adaptability is improved, but the stability deteriorates when large rearward force is applied during collision
Solution Approach 1:
The invention divides the sleeve support part into multiple segments: the U-shaped main body structure and separate collar members positioned at specific locations. This segmentation allows the U-shape to maintain its opening for accommodation while the discrete collar members provide localized reinforcement to prevent deformation and maintain the vertical distance between the upper and lower walls under collision loads.
Solution Approach 2:
The collar members act as intermediary elements between the upper and lower walls of the U-shaped sleeve support part. These collars serve as mediator structures that transfer and distribute the rearward collision forces, preventing the direct transmission of stress that would cause the walls to deform and reduce the vertical distance, thereby maintaining stability while preserving the U-shaped configuration.
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 solution effectively restricts the deformation of the headrest support portion, preventing significant rearward tilting and maintaining the structural integrity of the headrest, while still accommodating various units like image display devices within the seat.
Implementation Method 1
tubular collars between the upper and lower walls, which provide high bending and compression rigidity
Implementation Method 2
tubular collars between the upper and lower walls, which provide high bending and compression rigidity
Data Source
AI summary
A headrest support structure has an upper panel, a collar and a sleeve. The upper panel extends in a width direction of a seatback frame at the upper part. The upper panel has a sleeve support part including upper and lower wall parts facing in a direction perpendicular to the width direction. The sleeve support part is in a U-shape open to a side opposite to a seating side in a longitudinal sectional shape. The upper and lower wall parts have upper and lower holes. The collar is in a tubular shape with a through hole. The collar is arranged between the upper wall part and the lower wall part to have the through hole communicate with the upper and lower holes. The sleeve is inserted through the upper hole, the through hole, and the lower hole. A rod-like leg portion of a headrest is insertable in the sleeve.