Unfolding device of sofa
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Solution Overview
Problem
Current functional sofas fail to provide an effective 'flat lying state' for relaxation due to limited backrest rotation angles, resulting in insufficient relaxation and increased blood circulation pressure.
Innovation Solution
An unfolding device for a zero-gravity functional sofa, featuring a base, side plate, connecting rod assembly, and driving assembly that allows the side plate to tilt forward, creating a greater height difference between the footrest and backrest, enabling a maximum included angle of 50° for enhanced relaxation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backrest portion is rotated flat to achieve a lying state, then the sofa provides a lying function, but the backrest rotation angle is limited so that the heart height cannot be lowered sufficiently for effective relaxation
Solution Approach 1:
The patent applies dynamics by making the side plate movable relative to the base through a driving assembly. The side plate can be driven to move forward and tilt, dynamically changing the height difference between the footrest assembly and backrest connecting member. This dynamic adjustment allows the mounting assembly angle to reach 27°-50°, sufficiently lowering the heart height for effective relaxation while maintaining structural stability through controlled movement.
2Ease of operation
If the side plate is tilted forward to increase height difference between footrest and backrest, then the heart height is lowered for better relaxation, but the structural complexity increases
Solution Approach 1:
The patent merges multiple functions into the side plate structure. The side plate serves as both a structural support component and an active element that tilts forward to adjust height difference. The mounting assembly for the sitting portion is integrated with the side plate, allowing the side plate's forward movement and tilting to simultaneously achieve both structural positioning and heart height adjustment, reducing the need for separate complex adjustment mechanisms.
Solution Approach 2:
The side plate is designed as a multi-functional component that performs multiple roles: structural support, height difference adjustment through forward movement and tilting, and angle control for the mounting assembly. This universal design allows a single component to achieve heart height adjustment without requiring additional dedicated mechanisms, thereby managing structural complexity while improving relaxation effect.
Data Source
AI summary
The present application relates to an unfolding device of sofa, including a base. A side plate is provided above the base, and a connecting rod assembly is connected between the side plate and the base; the side plate is provided with a mounting assembly for connecting to a sitting portion; a footrest assembly and a backrest connecting member is mounted on and rotatably connected with the side plate; the base is provided with a driving assembly, configured for driving the footrest assembly to rotate and the side plate to move towards a front of the unfolding device.