Pivoting Stadium Chair Backrest for Reclining Comfort
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Solution Overview
Problem
Bleachers and stadium chairs are often uncomfortable due to their rigid construction and lack of cushioning, leading to discomfort during extended use, and existing solutions do not adequately address the need for improved comfort and flexibility.
Innovation Solution
A stadium chair design featuring a pivotally attached backrest with a biasing element allowing limited rearward rotation, providing a reclining or rocking motion, and removable armrests that can be installed without tools, incorporating flexible webbing and optional cushioning for enhanced comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid construction is used for the stadium chair, then structural strength is improved, but user comfort deteriorates
Solution Approach 1:
The backrest is made dynamically movable through a pivot mechanism that allows it to rotate between a forward position and a rearward position. This dynamic capability enables the backrest to adapt to user preferences and provide reclining functionality, thereby improving comfort while maintaining structural integrity through the pivot connection.
Solution Approach 2:
The biasing element changes the mechanical parameter of the backrest system by providing a restoring force that enables controlled rotation. This parameter change allows the backrest to move between positions while maintaining stability, resolving the contradiction between rigid strength and flexible comfort.
2Stability of the object's composition
If a fixed backrest position is used, then structural stability is improved, but user comfort deteriorates
Solution Approach 1:
The backrest transitions from a fixed position to a dynamically adjustable position through the pivot mechanism. Users can rotate the backrest to desired angles and the biasing element provides a restoring force that maintains stability in the new position, thus achieving both stability and comfort.
Solution Approach 2:
The biasing element automatically provides the restoring force needed to return the backrest to its neutral position after use, and enables the reclining motion without requiring additional mechanical assistance. This self-service mechanism maintains stability while enabling comfort adjustments.
3Ease of operation
If permanent armrests are installed, then user comfort is improved, but device complexity increases
Solution Approach 1:
The armrests are segmented from the main chair structure and designed as separate, removable components. This segmentation allows users to install or remove armrests based on their needs, providing comfort when desired while avoiding the added complexity of permanently integrated armrest mechanisms.
Solution Approach 2:
The armrests transition from a fixed permanent state to a dynamically adjustable state where they can be installed or removed. This dynamic configurability allows the chair to adapt to different user preferences without permanently increasing device complexity.
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 design enhances user comfort by allowing controlled reclining or rocking of the backrest and provides optional armrests that can be easily added or removed, improving seating experience and usability.
Implementation Method 1
a biasing element that allows the backrest to rotate rearward a limited amount relative to the seat
Data Source
AI summary
A stadium chair has a seat frame and a backrest frame pivotally coupled to the seat frame for rotation about an axis parallel to a rear portion of the seat frame. The backrest frame is capable of forward rotation about the axis toward the seat frame and rearward rotation about the axis away from the seat frame. A biasing element coupled to either the seat frame or the backrest frame causes forward biasing of the backrest frame toward a neutral position relative to the seat frame. The biasing element allows for limited rearward rotation of the backrest frame from the neutral position and allows for forward rotation of the backrest frame from the neutral position. The chair preferably is configured to receive optional rotatable armrests that may be installed or removed without the use of tools.