Intelligent sofa mechanical extension device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sofa mechanical extension devices are complex, bulky, and prone to wobbling and deformation during operation, which affects their stability and the ability to achieve a comfortable zero-gravity lying posture.
Innovation Solution
An intelligent sofa mechanical extension device with a simplified structure, featuring a motor-driven system with a guide rail, backrest and leg rest assemblies, and a backrest spring that allows for controlled extension and retraction, along with V-shaped and pin-based limiting mechanisms to maintain stability in various postures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional mechanical connectors and drive assemblies are combined to form an electromechanical extension device, then various comfortable performances can be provided, but the structure becomes complicated and bulky, resulting in waste of space and inconvenience of transportation and installation
Solution Approach 1:
The patent combines multiple mechanical connectors (first connector, second connector, third connector) and drive assemblies into an integrated extension device where components work together in a unified mechanism. The first connector connects the backrest to the seat cushion, the second connector connects the leg rest plate to the seat cushion, and the third connector connects the leg rest plate to the backrest, forming a coordinated system that provides multiple postures through a single integrated structure rather than separate bulky components
Solution Approach 2:
The extension device is designed to provide multiple functions through a single system: it can adjust the backrest angle, extend the leg rest plate, and create various comfortable postures (sitting, reclining, zero-gravity) using the same set of connectors and drive assemblies. This multi-functional design eliminates the need for separate dedicated mechanisms for each function, reducing overall structural complexity
2Adaptability or versatility
If multiple mechanical connectors are combined in the electromechanical extension device, then various comfortable performances can be achieved, but the device shakes apparently and wobbles and deforms easily during the opening and swinging process
Solution Approach 1:
The patent incorporates limiters (first limiter, second limiter, third limiter) that are pre-positioned to constrain the movement ranges of the connectors before excessive movement can occur. The first limiter restricts the first connector's movement, the second limiter restricts the second connector's movement, and the third limiter restricts the third connector's movement, preventing wobbling and deformation by establishing stable movement boundaries in advance
Solution Approach 2:
The patent introduces guide rails as intermediary components that guide the movement of the drive assemblies and connectors. The guide rails ensure that the mechanical connectors move along predetermined stable paths during the opening and swinging process, preventing apparent shaking and deformation by mediating the interaction between the drive assemblies and the mechanical connectors
3Ease of operation
If the mechanical extension device is opened in the swing process, then the extension function can be achieved, but the device will shake apparently and wobble and deform easily, affecting the functional and structural stability
Solution Approach 1:
Guide rails are introduced as intermediary components that guide the movement of drive assemblies and connectors during the swing process. These guide rails ensure that extension occurs along predetermined stable paths, preventing shaking and deformation while maintaining the extension function, thus improving both ease of operation and reliability simultaneously
4Ease of operation
If the mechanical extension device uses traditional connectors, then basic extension can be achieved, but the lying posture is not flat and the zero-gravity lying posture function cannot be achieved
Solution Approach 1:
The patent adjusts the geometric parameters and configuration of the mechanical connectors to enable the backrest and leg rest plate to achieve specific angle relationships required for zero-gravity posture. By modifying the connector designs and their arrangement, the system can achieve the precise angular parameters needed for flat lying and zero-gravity positions, transforming the basic extension function into a multi-posture system capable of zero-gravity functionality
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 device achieves a stable and comfortable zero-gravity lying posture by ensuring a clear sequence of extension and retraction, reducing wobbling and deformation, and allowing for a flatter lying position through ergonomic design.
Implementation Method 1
The driving component includes a motor and a motor guide rail that are disposed on the base
Implementation Method 2
a backrest spring that allows for controlled extension and retraction
Implementation Method 3
A front end of a seat cushion support assembly and a rear end of the seat cushion support assembly are hinged to an end of the backrest assembly and an end of the leg rest assembly respectively
Data Source
AI summary
The present application provides an intelligent sofa mechanical extension device, including a base, a driving component and an extension component, where the driving component and the extension component are disposed on the base. The driving component includes a motor and a motor guide rail that are disposed on the base. The motor guide rail is provided with a motor moving slider in a slidable manner. An end of the motor is connected to the moving slider. The moving slider is connected to a driving rod through a drive connector. The driving rod is disposed on the seat cushion support assemblies on the left and the right side. The extension component is driven to stretch or retract with back-and-forth movement of the motor moving slider along the motor guide rail.