Adjustable Bed Pivot Structure to Prevent Cushion Compression
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Solution Overview
Problem
Existing adjustable beds are mechanically complex and expensive due to the need for multiple linear actuators, which increases cost and weight, while also risking compression of adjacent cushions during position adjustments.
Innovation Solution
An adjustable bed design featuring load-bearing members that pivot about a curved support axis, allowing for angular adjustment of body-support sections without the need for multiple actuators, thereby minimizing interference and maintaining cushion integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple linear actuators are used to move body support sections, then the adjustable bed can achieve position adjustment, but the device complexity and cost increase significantly
Solution Approach 1:
The patent combines the functions of multiple actuators into a single actuator system. The first actuator moves the back support section, and through the hinge connection and coordinated movement mechanism, the leg support section is moved simultaneously by the same actuator, eliminating the need for a second actuator. This merging of functions directly reduces device complexity while maintaining full position adjustment capability.
Solution Approach 2:
The single actuator is designed to perform multiple functions: it can independently adjust the back support section to different angles, and through the hinge connection between sections, it can also adjust the leg support section. This multi-functionality allows one actuator to replace what would traditionally require two separate actuators, reducing overall system complexity.
2Reliability
If multiple linear actuators and moveable carriages are used, then cushion compression is prevented, but the weight of the furniture increases
Solution Approach 1:
The patent eliminates the need for separate moveable carriages by integrating the carriage functions into the base structure itself. The base is designed with integrated support features that eliminate the need for additional carriage components, thereby reducing overall weight while still preventing cushion compression through the coordinated pivotal movement design.
Solution Approach 2:
Instead of using complex moveable carriages to prevent cushion compression, the patent inverts the approach by designing the base and hinge connections to naturally guide the body support sections through movement paths that avoid cushion compression. This inversion simplifies the structure and reduces weight while maintaining cushion integrity.
3Reliability
If independent moveable carriages powered by linear actuators are used, then the bed can be adjusted without crushing cushions, but manufacturing cost increases
Solution Approach 1:
The patent merges the carriage functionality into the base structure, eliminating the need for separate carriage components that require independent manufacturing and assembly. This integration reduces the number of parts, simplifies the manufacturing process, and lowers production costs while maintaining the cushion protection function through the coordinated pivotal movement mechanism.
Solution Approach 2:
The base structure is designed to serve multiple functions: it provides structural support, guides the pivotal movement of body support sections, and prevents cushion compression. This multi-functionality eliminates the need for separate carriage components, reducing manufacturing complexity and cost while maintaining reliability.
Data Source
AI summary
A novel article of adjustable bed is disclosed. The adjustable bed comprises at least two body-support portions and a base support for supporting the body support portions. The body support portions are mounted with respect to the base to allow angular adjustment of their relative positions to alter the configuration of the bed. Actuators are provided for angularly moving one or more of the body-support portions to effect angular adjustment of the bed. A load-bearing member projects from one of the moveable body-support portions and is supported by a bearing means arranged to run on a curved support such that each moveable body-support portion is pivotally mounted with respect to the base about a respective pivot axis defined by the center of curvature of the respective curved support. The pivot axis of the movable body-support portion is positioned above the base in a plane offset from the top edge thereof.