Motorized Vehicle Headrest With Diagonal Pad Positioning
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Solution Overview
Problem
Conventional headrests in vehicles cannot effectively adjust to different passenger body types and support the head accurately, leading to discomfort and potential neck injury during accidents.
Innovation Solution
A vehicle headrest device with a pad portion that moves upwards/downwards and diagonally, equipped with motor-driven modules to adjust to the passenger's head position, ensuring accurate support regardless of seat back rotation and body shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the headrest is designed to move only upwards/downwards and forwards/forwards, then the structure is simple, but the head support position cannot be adjusted effectively for different passenger body types and seat back rotations
Solution Approach 1:
The headrest is divided into two independently controllable parts: the main frame that moves upwards/downwards along the headrest stay, and the pad portion that can move diagonally relative to the main frame. This segmentation allows each part to perform specific adjustment functions, achieving multi-directional head support positioning without requiring the entire headrest structure to be complex and multi-axis simultaneously.
Solution Approach 2:
The headrest employs motor-driven dynamic adjustment mechanisms: an up/down motor for vertical movement of the main frame, and a relax motor for diagonal movement of the pad portion. These dynamic components enable the headrest to adapt to different passenger body types and seat back rotations by actively adjusting position rather than relying on fixed or manually-adjustable mechanisms.
2Ease of operation
If the seat back is rotated for relax mode, then passenger comfort is improved, but the headrest moves away from the passenger's head due to different centers of rotation
Solution Approach 1:
The system incorporates a controller that receives signals from a operation signal receiver (likely detecting seat back rotation or passenger position) and automatically adjusts the headrest position through the motor modules. This feedback mechanism ensures that when the seat back rotates for relax mode, the headrest dynamically compensates by moving the pad portion diagonally to maintain accurate contact with the passenger's head, preventing the detachment problem.
3Reliability
If conventional headrests are used with fixed movement directions, then manufacturing is simple, but neck injury prevention is insufficient during accidents
Solution Approach 1:
The headrest adds a diagonal movement dimension to the traditional vertical movement. The pad portion can move diagonally (both vertically and horizontally) relative to the main frame, providing multi-dimensional adjustment capability. This enhanced positioning capability ensures the headrest maintains accurate support in various accident scenarios and passenger positions, improving neck injury prevention without requiring overly complex manufacturing processes.
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 headrest provides comfortable and secure head support, preventing neck injury by maintaining accurate positioning during seat adjustments and accommodating various passenger postures.
Implementation Method 1
an up/down lead screw configured to rotate when the up/down motor operates, and an up/down carrier having one end penetrated by the up/down lead screw through screw coupling
Implementation Method 2
a relax lead screw diagonally connected to the relax motor so as to rotate when the relax motor operates, and a relax carrier having one end penetrated by the relax lead screw through screw-coupling
Data Source
AI summary
An embodiment vehicle headrest device includes a headrest including a pad portion configured to contact and support a sitting passenger's head and a cover portion positioned behind the pad portion, the pad portion being configured to move diagonally, a main frame coupled to a headrest stay and configured to move upwards/downwards along the headrest stay, and a motor module portion connected to the pad portion and the main frame such that, in operation, the motor module portion is configured to move an entirety of the headrest, including the main frame, upwards/downwards or to move only the pad portion diagonally.