Ergonomic Stool with Rotatable Armrests for Forward-Leaning Work
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Solution Overview
Problem
Conventional stools and chairs are not ergonomically designed to support tattoo artists or medical personnel when they lean forward, leading to fatigue, discomfort, and pain in the arms, shoulders, and lower back.
Innovation Solution
A reconfigurable support apparatus with a padded chest support and adjustable armrests that can be rotated between stowed and deployed positions to allow for unrestricted movement of the user's arms and shoulders, providing ergonomic support for tattoo artists and medical personnel.
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 when leaning forward, causing fatigue and discomfort
Solution Approach 1:
The support apparatus is divided into distinct functional segments: a chest support assembly with separate armrests, a seat assembly, and a back support assembly. This segmentation allows each component to be optimized independently for its specific function while maintaining overall structural simplicity
Solution Approach 2:
The chest support assembly serves multiple functions: it supports the user's chest weight, provides a stable base for armrests, and allows forward leaning while maintaining posture. The armrests themselves are multi-functional, providing arm support in multiple positions and configurations
2Ease of operation
If the chest support is wider to provide more support, then comfort is improved, but movement of arms and shoulders is restricted
Solution Approach 1:
The chest support is segmented into a central support structure with laterally positioned armrests. This segmentation creates distinct functional zones: the central portion provides chest support width for comfort, while the lateral armrest positions maintain clearances that preserve arm and shoulder movement freedom
Solution Approach 2:
Different portions of the chest support assembly have different widths and functions. The central chest support area is wider to provide comfort and support, while the lateral regions near the armrests are designed with clearances to allow unrestricted arm movement. Each local area is optimized for its specific function
3Ease of operation
If armrests are longer to support forearms, then arm support is improved, but wrist and hand movement is restricted
Solution Approach 1:
The armrests are designed with rotational capability, allowing them to dynamically adjust between a lowered position for forearm support and a raised position for chest/shoulder support. This dynamic adjustment enables the armrests to provide support when needed while maintaining movement freedom when the support function is not required
Solution Approach 2:
The armrest structure is segmented into a main support portion and a forward extension portion. The main portion provides forearm support when lowered, while the forward extension provides additional support points. This segmentation allows selective engagement of support functions without restricting wrist and hand movement
4Adaptability or versatility
If the support apparatus is fixed in one configuration, then manufacturing is simple, but it cannot adapt to different sitting directions and tasks
Solution Approach 1:
The armrests are rotatably mounted to the chest support assembly, enabling dynamic reconfiguration between lowered and raised positions. This simple rotational mechanism allows the apparatus to adapt to different sitting directions and tasks without requiring complex adjustment systems
Solution Approach 2:
The rotatable armrest mechanism provides multiple functions: forearm support when lowered, chest/shoulder support when raised, and the ability to accommodate different sitting orientations. This single dynamic mechanism replaces what would otherwise require multiple fixed configurations
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.