Sofa Bed Locking Mechanism for Easy Conversion and Stability
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Solution Overview
Problem
Conventional sofa beds are bulky, aesthetically constrained, difficult to use, and complicated to manufacture due to their articulating mechanisms and multiple sections, which affect their functionality and appeal.
Innovation Solution
A convertible sofa bed with a compact folding apparatus that includes a mid-swinging and rear-swinging member, a locking mechanism, and bias members to facilitate easy conversion between sofa and bed configurations, reducing the need for heavy lifting and improving manufacturability by organizing components into modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional sofa beds use multiple bed sections with integrally formed mattress portions and articulating mechanisms, then the sofa bed can be converted between bed and sofa configurations, but the sofa bed becomes bulky and aesthetically constrained
Solution Approach 1:
The patent applies nesting by placing the intermediate bed section beneath the forward seating support portion when stowed, and positioning the articulating mechanism within the sofa frame structure. This nested arrangement allows the bed sections and mechanism to occupy overlapping spatial volumes, reducing the overall bulk of the sofa bed while maintaining full convertibility between configurations.
2Stability of the object's composition
If the articulating mechanism is designed to provide stability when deployed, then the sofa bed remains stable, but the threshold to articulate the sofa bed becomes high making it difficult to use
Solution Approach 1:
The patent applies dynamics by incorporating a locking mechanism that transitions between locked and unlocked states based on the position of the intermediate section. When the intermediate section is in the stowed position, the locking mechanism engages to provide stability. When lifted to a predetermined position, the locking mechanism disengages to allow articulation. This dynamic locking system maintains stability during use while enabling easy conversion between configurations.
3Reliability
If the sofa bed components including bed sections and articulating mechanism are made bulky to ensure stability and functionality, then the sofa bed functions properly, but the manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the sofa bed into distinct modular components: the sofa frame, the intermediate bed section, the forward seating support portion, and the articulating mechanism with locking mechanism. Each component can be manufactured independently and assembled together, reducing overall manufacturing complexity while maintaining the reliability and functionality of the complete sofa bed system.
Data Source
AI summary
A seat convertible to a bed. The seat includes a locking mechanism for fixably maintaining a head panel section of the bed in a generally horizontal orientation when the bed is in the deployed configuration and releasing the head panel section from the deployed configuration by a lifting motion. The locking mechanism is connected to the head panel section and a mid-swinging member. The mid-swinging member pivotally attaches to the head panel section and a stationary mounting arm. The stationary mounting arm is fixably attached to a seat frame.