Segmented Chair Seat Board for Dynamic Waist Support
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Solution Overview
Problem
Conventional chair seat boards fail to provide an optimal angle for user comfort, often leading to waist pain due to gravity, and can cause kyphosis or spine bending when used in fixed postures for long periods, with existing tilting mechanisms being overly complex and sometimes harmful.
Innovation Solution
An ergonomic chair seat board design featuring a frame unit with independent movement, supported by a multi-layered support unit and covered with memory foam, allowing omnidirectional movement and flexible tilt adjustment to maintain a neutral waist posture and optimal sciatic balance, with a backboard that deforms according to user posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional tilting seat board is used to provide waist comfort, then the user can lie down comfortably, but the configuration becomes very complicated due to a large number of constitutive elements
Solution Approach 1:
The seat board is divided into multiple independent frames (first frame, second frame, third frame, fourth frame) that can move independently relative to each other. Each frame is supported by its own support unit with springs, allowing localized adjustment without requiring a complex overall tilting mechanism. This segmentation enables waist comfort through independent frame movement while avoiding the complexity of conventional tilting mechanisms.
2Ease of operation
If a conventional tilting seat board is used to make the waist comfortable, then the user can relax, but unreasonable waist angle occurs due to body deformation which is harmful to waist health
Solution Approach 1:
The support units incorporate springs that allow dynamic adjustment of frame positions based on user body weight and posture. The frames can tilt forward or backward within a controlled range, maintaining a reasonable waist angle even when the user relaxes. This dynamic support prevents harmful waist deformation while still providing comfort, as the springs automatically adjust to maintain proper ergonomics.
3Device complexity
If a fixed posture chair is used for long periods, then the chair structure remains simple, but blood supply to intervertebral cartilage is blocked causing legs to become stiff
Solution Approach 1:
The multiple frames are designed to move independently with respect to each other through spring-based support units. This creates subtle movements and adjustments in the seat surface even when the user maintains a relatively fixed posture, preventing complete stagnation of blood flow. The dynamic capability is achieved through simple spring mechanisms rather than complex active systems, thus maintaining structural simplicity while avoiding blood circulation blockage.
4Strength
If the seat board is made rigid to provide stable support, then the structural strength is improved, but the ability to adapt to user posture is reduced
Solution Approach 1:
The seat board is segmented into multiple rigid frames that maintain individual structural strength, yet these frames can move independently relative to each other. Each frame remains strong and stable, but the collection of frames can adapt to user posture through their independent movements. This segmentation allows both structural strength at the component level and adaptability at the system level.
Solution Approach 2:
The spring constants and pre-compression forces of the support units can be adjusted to change the stiffness characteristics of each frame. This allows the system to maintain rigid support when needed while permitting necessary movements for posture adaptation. By adjusting physical parameters of the spring mechanisms, the balance between strength and adaptability can be optimized.
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 ergonomic chair seat board provides a comfortable seating experience by maintaining an optimal 125-135 degree angle, preventing waist strain and promoting blood circulation, while allowing flexible postures without interference, and optimizing sciatic balance and weight distribution.
Implementation Method 1
implementing to move it up and down depending on the user's sitting posture
Implementation Method 2
flexible movement of a plurality of frames relative to spring groups
Data Source
Figure 1~2
Figure 3
Figure 4a~4c
AI summary
Disclosed is a chair seat board 100 and a chair 1000 to which a chair backboard 200 is coupled. The chair seat board 100 according to an embodiment of the present invention may comprise: a frame unit 40 having a plurality of frames (41, 42, 43, 44) configured in a hollow shape, respectively, and implemented to allow independent movement; and a support unit configured to support the frame unit 40 while being coupled to the frame unit 40 on a lower side of the frame unit 40.