Tiltable Recliner Headrest Mechanism for Adaptive Neck Support
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Solution Overview
Problem
Conventional recliner chairs lack versatile headrest configurations that provide adequate support in different reclined positions, limiting comfort and functionality.
Innovation Solution
A reclining seating unit with a headrest mechanism that moves from a retracted position in the upright position to an extended, forward-tilted position when the chair is fully reclined, integrated with the reclining mechanism to adjust the headrest's angle relative to the backrest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the headrest is fixed in a retracted position, then the chair maintains a compact upright profile, but the headrest cannot provide adequate support when the chair is reclined
Solution Approach 1:
The headrest is designed to be dynamically repositionable, transitioning from a fixed retracted position to an extended forward-tilted position. The headrest mechanism includes a headrest link that pivots to change the headrest's angle relative to the backrest, allowing the headrest to adapt its position and orientation based on the chair's recline state and user needs
Solution Approach 2:
The headrest mechanism is integrated within the existing reclining mechanism structure. The headrest link is pivotally connected to the reclining mechanism, utilizing the same structural framework to achieve dual functionality - the headrest can be adjusted independently while sharing the mechanical infrastructure of the reclining system
2Ease of operation
If the headrest is extended forward to face the user, then head support and comfort are improved, but the headrest occupies more space in the upright position
Solution Approach 1:
The headrest transitions between retracted and extended positions dynamically. When the chair is upright, the headrest link positions the headrest in a compact retracted state. When the chair is reclined, the headrest can be extended forward to provide comfort, with the mechanism allowing smooth transition between these states based on the chair's angle
3Adaptability or versatility
If a simple fixed headrest is used, then the device complexity is low, but the headrest cannot adapt to different reclined positions
Solution Approach 1:
The headrest incorporates a pivoting link mechanism that allows it to adapt its position. The headrest link connects the headrest to the reclining mechanism, enabling the headrest to pivot and change orientation. This dynamic adjustment capability allows the headrest to adapt to different reclined positions while using a relatively simple mechanical linkage
Solution Approach 2:
The headrest mechanism serves multiple functions: it provides head support in various positions, adapts to different chair angles, and integrates with the existing reclining mechanism. The same headrest structure can accommodate both upright and reclined positions, eliminating the need for separate adjustment mechanisms
Data Source
AI summary
A reclining seating unit includes: a base; a seat; a backrest; a reclining mechanism attached to the base, seat and backrest, the reclining mechanism configured to move the seating unit between an upright position and a fully reclined position; a headrest that is positioned in front of an upper portion of the backrest; and a headrest mechanism attached to the headrest and to the reclining mechanism. The headrest mechanism is configured to move the headrest from a retracted position when the seating unit is in its upright position to an extended position when the seating unit is in its fully reclined position. In the retracted position the headrest is generally parallel with the backrest and in the extended position the headrest defines an angle with the backrest in which the front surface of headrest is rotated to partially face the front surface of the backrest.