Adjustable Sofa Backrest and Headrest With Simple Rotary Support
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Solution Overview
Problem
Current sofas with waist and head adjustment functions have complex structures and high costs, failing to meet the increasing demand for comfort.
Innovation Solution
A sofa waist propping device with a frame and adjustable mechanisms, featuring a rotatable backrest driven by a first driving member and a headrest mechanism driven by a second driving member, allowing for adjustable positions of the backrest and headrest within specific angles, utilizing a simple and stable structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex adjustment mechanism is used to achieve waist and head position adjustment, then the comfort and functionality are improved, but the structure becomes complex and cost increases
Solution Approach 1:
The adjustment mechanism is divided into independent modular units: a driving member with driving source, a transmission member with gear structures, and a prop member with positioning features. Each module performs a specific function (driving, transmitting motion, and positioning), allowing the complex adjustment system to be built from simple, standardized components that reduce overall structural complexity while maintaining full adjustment functionality for both waist and head positions.
2Adaptability or versatility
If a complex adjustment mechanism is used to achieve waist and head position adjustment, then the comfort and functionality are improved, but the cost increases
Solution Approach 1:
The patent uses identical or similar structural components for both the waist adjustment mechanism and head adjustment mechanism. Both use the same type of driving member with driving source, transmission member with gear structures, and prop member with positioning features. This standardization allows for batch production, reduced manufacturing costs, and simplified assembly processes while providing complete adjustment functionality for both positions.
3Stability of the object's composition
If the backrest rotation angle is limited to 0° to 30°, then the structure stability is improved, but the adjustment range is reduced
Solution Approach 1:
The backrest and headrest are designed with dynamic adjustment capabilities through the driving member and transmission member system. The gear structures allow controlled rotation within the stable 0° to 30° range, while the prop member with positioning features enables the system to adapt to different user needs within this range. The dynamic adjustment mechanism maintains structural stability while providing sufficient versatility for various seating positions and comfort requirements.
Data Source
AI summary
A sofa waist propping device includes a frame and a waist adjusting mechanism, the frame being fixed on a sofa or a seat, the waist adjusting mechanism comprising a backrest and a first driving member rotatably connected to the frame respectively, the first driving member being rotatably connected to the backrest and driving the backrest to rotate around the frame. Since the first driving member is rotatably connected to the backrest and drives the backrest to rotate around a fixing member, the position of the backrest is adjusted, with a structure simple and stable and comfortableness increased.