Speaker-Integrated Headrest Structure for Uniform Pad Softness
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Solution Overview
Problem
Existing headrests with ventilation holes for speakers suffer from partial reduction in stiffness, leading to uneven softness and discomfort for users.
Innovation Solution
A headrest design featuring a mesh-shaped shape retainer on the pad surface to cover speaker openings, coupled with a stiffer frame for enhanced stiffness and load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If ventilation holes are formed in the pad and skin cover for speaker sound transmission, then sound output is improved, but the stiffness of the pad and skin cover is partially reduced causing uneven softness
Solution Approach 1:
A shape retainer is specifically positioned at the pad opening portion where stiffness is needed, rather than making the entire pad rigid. This localized reinforcement maintains uniform softness in non-critical areas while providing structural support only where pad openings compromise strength.
Solution Approach 2:
The shape retainer is formed from a material with different properties than the pad, creating a composite structure. The retainer material provides the necessary stiffness reinforcement at critical locations while the pad material maintains its softness and comfort properties in surrounding areas.
2Strength
If a shape retainer is added to reinforce the pad opening portion, then stiffness at the pad opening is improved, but the device complexity increases
Solution Approach 1:
The shape retainer is integrated with the skin cover in a unified structure, where the retainer and cover work together as a single assembly. This merging reduces the number of separate components and simplifies the overall device while maintaining the necessary stiffness reinforcement.
Solution Approach 2:
The skin cover is designed to serve dual functions: as the outer covering and as the structural element that incorporates the shape retainer. This multi-functionality eliminates the need for a separate retainer component, reducing device complexity while maintaining structural integrity.
3Stability of the object's composition
If the shape retainer extends vertically across the front surface of the pad, then load distribution is improved and partial deformation is reduced, but the manufacturing complexity increases
Solution Approach 1:
The shape retainer is divided into multiple vertical strips that extend across the front surface of the pad. This segmentation provides effective load distribution and deformation prevention while allowing each strip to be manufactured and positioned independently, simplifying the overall manufacturing process.
Solution Approach 2:
The vertical strips of the shape retainer act as intermediary elements between the pad and the user's head. These strips distribute applied loads across multiple contact points, preventing localized deformation while maintaining the pad's overall softness and comfort characteristics.
Data Source
AI summary
A headrest of a vehicle seat includes a headrest pillar supported by a seat back; a headrest body coupled to the headrest pillar; at least one speaker supported by the headrest body; a pad for covering the headrest body, the pad having at least one pad opening which faces the at least one speaker; a mesh-shaped shape retainer provided on the outer surface of the pad so as to cover the at least one pad opening, edges of the shape retainer being coupled to the outer surface of the pad; and a skin cover for covering the pad and the shape retainer.