Reclining Seatback with Elastic Segments for Lower Back Comfort
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Solution Overview
Problem
Conventional reclining chair backrests made of hard materials fail to provide comfortable support to the user's lower back, leading to discomfort and low-back pain due to lack of adjustability and elasticity.
Innovation Solution
A reclining seatback support device with a pivotally connected seatback body and support, featuring a swing arm and elastic segments, allowing the seatback body to be adjusted to a desired angle and providing smooth support to the user's lower back through elastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the backrest is made of hard materials, then the structural strength is improved, but the comfort and support for the user's lower back deteriorates
Solution Approach 1:
The backrest is divided into multiple segments including a rigid outer shell and an elastic inner segment. This segmentation allows the backrest to maintain overall structural strength while the elastic segment provides flexible support for comfort.
Solution Approach 2:
The backrest uses composite construction combining hard materials for structural integrity and elastic materials for comfort. This composite approach resolves the contradiction by integrating both rigid and flexible properties in a single backrest structure.
2Stability of the object's composition
If the backrest is made of hard materials, then the structural stability is improved, but the adaptability to user's back shape deteriorates
Solution Approach 1:
The backrest incorporates dynamic elements that allow it to adapt to different user back shapes. The elastic segment can deform and conform to various contours while the rigid structure maintains stability.
Solution Approach 2:
The backrest design allows changes in physical parameters such as flexibility and contour shape through the elastic segment, while maintaining structural stability through the rigid framework. This enables adaptation to different user geometries.
3Device complexity
If the seatback body is fixed, then the structural simplicity is improved, but the adjustability to desired reclining angle deteriorates
Solution Approach 1:
The seatback body is designed with dynamic characteristics, allowing it to rotate and recline to various angles. This dynamic capability provides adjustability while maintaining relatively simple structural implementation through rotational joints.
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
Enables comfortable seating by allowing the seatback body to be reclined to a desired angle, reducing lower back discomfort and pain even during prolonged sitting periods.
Implementation Method 1
the user's lower back can lean on the seatback body smoothly and get comfortable support by an elastic segments formed on a rod portion on each of two sides of the seatback body
Implementation Method 2
The seatback body and an upper end of the seatback support are provided with pivot bracket portions pivotally connected to each other
Data Source
AI summary
A reclining seatback support device which mainly includes at least one seatback support and a seatback body is revealed. The seatback body and an upper end of the seatback support are provided with pivot bracket portions pivotally connected to each other while a lower part of the seatback body and the seatback support are connected by a swing arm. When a user is sitting and lying down on the back, the seatback body is rotated around the pivot axis where the seatback body is pivotally connected to the upper end of the seatback support and then reclined at a certain angle. By elastic segments of the seatback body and the swing arm between the lower part of the seatback body and the seatback support for pulling and limiting the seatback body, the user can lean on the seatback body comfortably and safely.