Adjustable Bed Lumbar Support and Head Tilt Linkage Mechanism
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Solution Overview
Problem
Conventional adjustable beds have limited adjustability, which restricts users from achieving maximum comfort by not allowing sufficient customization of body positions during sleep.
Innovation Solution
A lumbar support mechanism and head tilt mechanism integrated into an adjustable bed, featuring a motor-driven linkage system that adjusts the distance between the lumbar support member and linkage member, and a head platform tilting actuator, allowing for customizable lumbar support and head positioning through telescopically movable activation rods and motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional adjustable beds are used, then the bed structure is simple, but the adjustability is limited
Solution Approach 1:
The bed is divided into multiple independently adjustable segments including head platform, back platform, lumbar support member, and foot platform. Each segment can be adjusted separately through its own actuator mechanism, allowing customized positioning while maintaining overall structural organization
Solution Approach 2:
The lumbar support mechanism is nested within the back platform structure, with the lumbar support member positioned between the user's lumbar region and the back platform. The activation rod for lumbar support is telescopically movable within the back platform, creating a compact nested arrangement that provides additional functionality without significantly increasing external dimensions
2Adaptability or versatility
If lumbar support mechanism is added, then lumbar support adjustability is improved, but device complexity increases
Solution Approach 1:
The linkage system employs asymmetric linkage members with different configurations on each side. The first and second linkage members have asymmetric arm arrangements that provide optimized mechanical advantage for lumbar support adjustment, allowing effective force transmission while maintaining structural compactness
Solution Approach 2:
The lumbar support mechanism uses dynamic linkage members that can change their effective length and configuration during operation. The support legs and linkage members pivot and reposition themselves as the lumbar support member moves between retracted and extended positions, providing adaptive mechanical advantage throughout the range of motion
3Adaptability or versatility
If head tilt mechanism is added, then head positioning customization is improved, but device complexity increases
Solution Approach 1:
The actuator mechanisms designed for platform adjustment are also used for head tilting and lumbar support functions. The same type of motor-driven telescopic rod mechanism controls multiple functions including head platform elevation, back platform adjustment, and lumbar support extension, reducing the variety of different actuator types needed
Solution Approach 2:
The head tilting mechanism is merged with the head platform support structure, where the activation rod for tilting is integrated into the existing head platform actuator assembly. This combines the tilting function with the elevation function in a unified mechanical arrangement
Data Source
AI summary
The lumbar support mechanism and an adjustable bed having the same. The lumbar support mechanism includes a lumbar support member; first, second, third and fourth support legs; a linkage member; and first and second lumbar support brackets operably attachable to a back platform of the adjustable bed. The first and second support legs are pivotally connected between the lumbar support member and the linkage member; and the third and fourth support legs are pivotally connected between the first and second support legs, and the first and second lumbar support brackets, respectively, such that the lumbar support member is operably movable between a retracted position and an expanded (ejected) position when the linkage member moves between first and second positions. The lumbar support is provided when the lumbar support member is in the ejected position.