Embedded Seat Bladder Control for Pressure Relief in Vehicles
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Solution Overview
Problem
Prolonged sitting in vehicles leads to discomfort and health issues such as pressure sores, sciatica pain, and hemorrhoids due to capillary occlusion, and existing cushion solutions are unsafe, cumbersome, and not integrated into the vehicle seat.
Innovation Solution
A vehicle seat assembly with embedded inflatable bladders that are sequentially inflated and deflated by a control system to relieve pressure and prevent capillary occlusion, providing adjustable firmness levels through a bladder pump and valve system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If cushions are placed atop existing vehicle seats to alleviate capillary occlusion, then pressure relief is improved, but safety and integration are worsened due to sliding and lack of integration
Solution Approach 1:
The inflatable bladder system is integrated directly into the vehicle seat structure, merging the pressure relief function with the seat itself. The bladders are positioned between the seat cushion and the user, creating a unified system that eliminates sliding issues and improves safety while maintaining pressure relief capabilities
2Object-affected harmful factors
If cushions are placed atop existing vehicle seats to alleviate capillary occlusion, then pressure relief is improved, but device complexity and usability are worsened due to being cumbersome and unattractive
Solution Approach 1:
The bladder system is combined with the seat structure during manufacturing, creating a streamlined integrated design. The control system is embedded within the seat, and the bladders are positioned between the cushion and user, eliminating the need for separate external cushions and reducing overall device complexity
Solution Approach 2:
The integrated bladder system serves multiple functions: it provides pressure relief, maintains seat structure integrity, and offers a streamlined aesthetic appearance. The same integrated structure that provides seating also delivers the therapeutic pressure relief function
3Object-affected harmful factors
If sequential inflation and deflation of bladders is implemented to relieve sitting pain, then pressure relief effectiveness is improved, but system complexity is worsened due to multiple bladders and control mechanisms
Solution Approach 1:
The seating surface is divided into multiple zones with separate inflatable bladders positioned at different locations. This segmentation allows independent control of each bladder, enabling sequential inflation and deflation patterns that effectively relieve sitting pain while maintaining manageable system complexity through modular design
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 solution effectively alleviates sitting pain and discomfort by continuously varying the pressure on tissues, preventing capillary occlusion and reducing the risk of associated health issues, while being integrated and safe within the vehicle seat.
Implementation Method 1
operate a bladder pump to inflate the first group of inflatable bladders to a target pressure
Implementation Method 2
operate a valve coupled to the second group of inflatable bladders to deflate the second group
Data Source
AI summary
A vehicle seat assembly is provided. The vehicle seat assembly includes multiple inflatable bladders embedded below a seating surface of a seat cushion portion. The inflatable bladders includes a first group and a second group, each of the first group and the second group having at least one of the inflatable bladders. The vehicle seat assembly further comprises a control system operably coupled to the inflatable bladders. The control system is configured to operate a bladder pump to inflate the first group of inflatable bladders to a target pressure, operate a valve coupled to the second group of inflatable bladders to deflate the second group, and upon expiration of a dwell period, operate the bladder pump to inflate the second group of inflatable bladders to the target pressure and operate a valve coupled to the first group of inflatable bladders to deflate the first group.