Vehicle Headrest Speaker Guide System for Sound Direction and Head Mobility
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Solution Overview
Problem
Existing vehicle seat headrests with integrated speaker units fail to optimally direct sound to the occupant while minimizing interference with head mobility and visibility, and do not provide a mechanism to adjust sound distribution effectively between different usage positions.
Innovation Solution
A headrest with a guide system that allows the speaker unit to transition between two usage positions through a combination of translation and rotation, using guide rails and a cam system, ensuring optimal sound direction to the occupant without obstructing mobility or visibility, and incorporating a drive system for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the speaker unit is positioned directly at the headrest to maximize sound emission to the occupant, then the sound distribution is improved, but the speaker unit interferes with the mobility of the occupant's head and hinders visibility
Solution Approach 1:
The speaker unit is made movable relative to the headrest support through a guide system that allows translation and rotation. This dynamic positioning enables the speaker unit to be adjusted to optimal sound distribution positions while clearing the path for head mobility and visibility when not in use, resolving the contradiction between sound emission effectiveness and physical obstruction.
2Adaptability or versatility
If the speaker unit is fixed in position to simplify the structure, then the device complexity is reduced, but the system cannot adapt to different usage positions and optimize sound direction
Solution Approach 1:
The speaker system is divided into separable components: the speaker unit, the headrest support, and the guide system. This segmentation allows the speaker unit to be independently positioned and adjusted relative to the headrest, enabling adaptability to different usage positions while keeping each component's structure relatively simple and manageable.
Solution Approach 2:
The guide system incorporates dynamic elements including guide rails for translation movement and a cam mechanism for rotation adjustment. These dynamic components enable the speaker unit to transition between different positions and orientations, providing adaptability to various usage scenarios while maintaining a controlled and organized structural complexity through standardized mechanical elements.
3Ease of operation
If the speaker unit is made movable to avoid obstructing head mobility and visibility, then the ease of operation is improved, but the device complexity increases due to the need for guide systems and positioning mechanisms
Solution Approach 1:
The guide system acts as an intermediary mechanism between the speaker unit and the headrest support. It provides a structured pathway for the speaker unit's movement, constraining it to specific translation and rotation trajectories. This intermediary structure enables smooth adjustment of the speaker unit to clear paths for head mobility and visibility while organizing the complexity into a systematic and controllable mechanism rather than chaotic ad-hoc positioning.
Data Source
AI summary
A headrest for a vehicle seat, comprising a support configured to receive and support the head of a seat occupant, and, connected to said support, at least one speaker system comprising: a speaker unit comprising a loudspeaker received in an airtight housing, a guide system for guiding the speaker unit relative to the support of the headrest, said guide system being configured so that the speaker unit can transition from a first usage position to a second usage position, and vice versa, the transition from the first usage position to the second usage position, and vice versa, corresponding to a movement combining a translation of the speaker unit and a rotation of the speaker unit.