Foldable Bed Frame Support Locking for Stable Leg Assembly
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Solution Overview
Problem
Existing foldable bed frames lack stability due to supports that do not have a reliable locking mechanism, leading to loose fasteners and instability over time.
Innovation Solution
The implementation of adjustable supports featuring an inner and outer tubular bar with a locking mechanism that restricts movement using a positioning piece and an unlocking mechanism with a push button, allowing for easy folding and unfolding of the bed frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If supports are short bars or struts directly fastened to the lateral bars and the sub-frames, then the structure is simple, but the fasteners become loose over time resulting in instability
Solution Approach 1:
The support bar is inserted into a cylindrical housing, creating a nested structure where the support bar fits inside the housing. This nested configuration allows the positioning piece to engage with restriction holes in both the support bar and housing, preventing relative movement and fastener loosening while maintaining a compact design.
Solution Approach 2:
The positioning piece acts as an intermediary element between the support bar and housing. It engages with restriction holes in both components to prevent relative movement, serving as a mediator that secures the connection without requiring complex fastening mechanisms.
2Device complexity
If supports are coupled without releasing or unlocking mechanisms, then the structure is simple, but decoupling requires pushing the supports sideways which is inconvenient
Solution Approach 1:
The support coupling mechanism transitions from a static locked state to a dynamic unlocked state through the push button mechanism. When the push button is pressed, the positioning piece disengages from the restriction holes, allowing the support bar to be pulled out easily. This dynamic mechanism simplifies decoupling while maintaining structural integrity during use.
3Reliability
If a locking mechanism with positioning piece and restriction holes is added to the supports, then the bed frame stability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is implemented locally at critical connection points rather than throughout the entire support structure. The positioning piece engages with restriction holes at specific locations on the support bar and housing, providing stability where needed without adding complexity to the entire support system.
4Reliability
If the positioning piece is held by elastic force against the restriction holes, then the locking is automatic and reliable, but the unlocking mechanism becomes more complex
Solution Approach 1:
The elastic member automatically pushes the positioning piece against the restriction holes to maintain the locked state without requiring continuous external force. This self-service mechanism ensures reliable locking while the push button provides a simple interface for unlocking when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a stable and safe foldable bed frame by ensuring the leg assembly can be securely locked and easily unlocked, enhancing stability and usability.
Implementation Method 1
The elastic member is configured to push the positioning piece outwardly and into the first and second restriction holes
Data Source
AI summary
Disclosed are adjustable supports and foldable bed frames. An adjustable support includes inner and outer tubular bars movably coupled to each other. A locking mechanism is disposed in the inner tubular bar and includes a positioning piece to restrict the inner and outer tubular bars from moving with respect to each other. An unlocking mechanism is fixedly coupled to the outer tubular bar and includes a push button to unlock the locking mechanism.