Adjustable height tubular bed frame
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Solution Overview
Problem
Existing bed frames are difficult to assemble, require tools, have fixed sizes, and lack stable support for different mattress thicknesses, often leading to squeaking and structural weaknesses.
Innovation Solution
A tool-less bed frame assembly using molded plastic legs with interlocking wedge and receiver systems, allowing adjustable height and width to accommodate various mattress sizes, ensuring the center support remains central for optimal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If stamped metal legs and angle iron rails are used for bed frame construction, then the frame can be manufactured at low cost, but the legs have hard edges that are dangerous during assembly and the height is fixed
Solution Approach 1:
The patent uses composite materials by combining metal rails with plastic/molded components for the legs and connection elements. This allows the frame to maintain low manufacturing cost while eliminating the hard edge problem associated with pure stamped metal legs, as the molded plastic components provide smooth, safe surfaces.
Solution Approach 2:
The invention introduces adjustable height capability through telescoping leg mechanisms, transforming the fixed height characteristic of traditional metal bed frames into a dynamic, adjustable feature. This allows the frame to adapt to different mattress thicknesses and user preferences while maintaining cost-effectiveness.
2Adaptability or versatility
If keyhole interlocks or stamped metal connections are used to assemble bed frame parts, then the frame can be constructed with multiple loose parts and extensions, but assembly requires tools and equipment knowledge
Solution Approach 1:
The patent replaces traditional mechanical fastening systems (screws, bolts, keyhole interlocks requiring tools) with a tool-less insertion and locking mechanism. The molded plastic connection elements feature integrated locking surfaces that engage with the metal rails through simple insertion motions, eliminating the need for tools while maintaining configuration flexibility.
Solution Approach 2:
The connection system is designed to be self-assembling through intuitive insertion motions that automatically engage the locking mechanisms. The frame components are designed to guide the assembly process themselves, requiring no external tools or specialized knowledge, making the system self-service friendly.
3Ease of operation
If interlocking stamped sheet metal plates are used for tool-less bed frame assembly, then assembly can be done without tools, but the metal plates are sharp and dangerous as well as heavy
Solution Approach 1:
The invention uses composite construction where molded plastic components replace the stamped sheet metal plates. This maintains the tool-less assembly advantage while eliminating the sharp edge hazard, as the molded plastic components provide smooth, safe surfaces throughout the connection elements.
4Strength
If sheet metal connections are used to transfer weight to the floor, then the structure can support bedding weight, but the connection points are inherent weaknesses that can loosen over time and cause squeaking
Solution Approach 1:
The patent uses composite material construction where molded plastic connection elements work in conjunction with metal rails. The plastic components provide large surface area contact and distributed load paths, while the metal rails provide structural strength. This combination maintains load-bearing capacity while eliminating the point-concentration weakness of pure sheet metal connections, preventing loosening and squeaking over time.
Data Source
AI summary
A bed frame that can be assembled without tools and that may be easily adjusted to provide for more than one mattress height. The frame is formed by side rails having wedges that are inter fit cross rails having receivers to form supporting legs. An extension can be selectively added to or removed from the receivers to change the height of the supporting legs and thus the height of the bed frame. In one option, the cross rails are telescoping in a manner than ensure that a center support associated with a central rail is always positioned in the middle of the frame regardless of whether the frame is configured for a narrow or wide mattress. In another option, the middle of bed is supported by a third cross rail having an adjustable height leg formed from a center wedge and removable receiver.