Stools, chairs, and methods using the same
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Solution Overview
Problem
Conventional stools and chairs are not ergonomically designed to support a user's chest and arms when leaning forward, leading to fatigue and discomfort for tattoo artists and medical professionals, who often experience lower back pain and muscle strain during prolonged tasks.
Innovation Solution
A reconfigurable support apparatus with a padded chest support and adjustable armrests that can be rotated between stowed and deployed positions, allowing for unrestricted movement of the user's arms and shoulders, and can be used in various ergonomic positions to reduce fatigue and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional stools and chairs are used, then the structure is simple and cost-effective, but they cannot provide ergonomic support for the user's chest and arms when leaning forward
Solution Approach 1:
The support apparatus is divided into distinct functional segments: a chest support component, armrest components, and a base structure. This segmentation allows each component to be optimized for its specific function while maintaining overall structural simplicity.
Solution Approach 2:
The support apparatus is designed to serve multiple functions: supporting the chest, supporting the arms, and providing a stable base. This multi-functionality eliminates the need for multiple separate devices while maintaining reasonable structural complexity.
2Ease of operation
If the chest support is wider to provide more support, then comfort is improved, but movement of the user's arms on the front side is restricted
Solution Approach 1:
The chest support is designed with non-uniform width: wider at the rear to provide comfort and support, and narrower at the front to allow free arm movement. This local variation in geometry optimizes both comfort and versatility simultaneously.
3Ease of operation
If armrests are longer to support the user's forearms, then arm support is improved, but movement of the user's wrists and hands is restricted
Solution Approach 1:
The armrests are designed with optimized length that provides sufficient forearm support while leaving the distal portion clear to allow unrestricted wrist and hand movement. This local optimization balances support and freedom of movement.
4Adaptability or versatility
If the support apparatus is fixed in one configuration, then manufacturing is simpler, but it cannot adapt to different sitting directions and tasks
Solution Approach 1:
The support apparatus incorporates movable armrests that can be adjusted between different positions and orientations. This dynamic capability allows the device to adapt to various sitting directions and tasks while maintaining reasonable manufacturing simplicity through standardized components.
Data Source
AI summary
An apparatus that supports a user in a variety of positions to comfortably perform tasks, such as applying one or more tattoos to skin of a subject is herein disclosed. The apparatus can be reconfigured to optimally position and support the arms and/or chest of the user. A method for using a stool can involve rotating armrests of the apparatus from a stowed position to a deployed position. The armrests can support the user's forearms while supporting the user's chest such that the user can comfortably perform tasks in front of a chest support of the stool.