Foldable Bed Linkage Assembly for Back Support Gap Reduction
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Solution Overview
Problem
Foldable bed assemblies often leave large gaps between the sleeping surface and the back support of furniture when extended, which can lead to lost items and inconvenience, especially in restricted living spaces.
Innovation Solution
A foldable bed frame assembly that includes a first slotted link attached to the back support and a double slotted link affixed to the bed frame, with an L-shaped adjustment link that slides and pivots to adjust the position of the back support, reducing the space between the bed frame and the back support during extension and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the storage cavity is made sufficiently large to store a collapsible mattress and foldable bed frame, then the bed can be stored within the furniture, but large gaps are left between the back support and the mattress when fully extended
Solution Approach 1:
The back support is made movable through a linkage mechanism that allows it to pivot between a vertical position (when bed is stored) and a horizontal position (when bed is extended). This dynamic adjustment eliminates gaps between the back support and mattress while maintaining compact storage volume.
Solution Approach 2:
A linkage mechanism consisting of links and pivot points is introduced as an intermediary between the bed frame and the back support. This mechanism mediates the movement and positioning to ensure the back support aligns properly with the mattress during extension, eliminating harmful gaps.
2Ease of operation
If the back support pivots more vertically when the bed is removed from storage, then the bed can be easily accessed, but the floor space increases when the bed is extended
Solution Approach 1:
The linkage mechanism utilizes vertical pivoting motion to achieve bed extension, transforming the problem from a horizontal space-consuming operation to a vertical motion operation. This allows the bed to be accessed easily while minimizing the horizontal floor space footprint.
Solution Approach 2:
The back support and linkage system are designed to pivot dynamically between vertical and horizontal positions, allowing easy bed access during storage and minimizing floor space during extension through controlled mechanical motion.
3Object-affected harmful factors
If a linkage mechanism is added to reduce gaps between the bed frame and back support, then the harmful gaps are eliminated, but the device complexity increases
Solution Approach 1:
The linkage mechanism is segmented into multiple simple links and pivot points rather than a single complex component. This segmentation allows the system to achieve the gap-elimination function through a series of simple, manageable mechanical elements that are easier to manufacture and assemble.
Data Source
AI summary
A bed assembly and method of use for connecting a foldable bed frame to the back support of a sofa. The assembly includes a first slotted link attached to the back support and a double slotted link affixed to the foldable bed frame. An L-shaped adjustment link defining a plurality of apertures is slidably connected to the slotted link and pivotably connected to the double slotted link whereby folding the bed frame causes the back support to displace along the first slotted link. Depending on whether the foldable bed frame is being removed from or inserted into the storage cavity within the sofa, the displacement of the back support along the slotted link causes the space between the bed frame and the back support to change.