Molded Seat Inserts for Pressure Relief and Body Conformability
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Solution Overview
Problem
Existing seat designs lack the ability to effectively conform to the user's body and provide enhanced comfort and pressure relief, particularly in sensitive areas like the perineum and ischium, while maintaining structural integrity and aesthetics.
Innovation Solution
Incorporating inserts made of materials like gel-like substances, air packets, and foams into the seat mold, which are encapsulated by polyurethane foam during the reaction injection molding process, allowing for customized density and heating elements to be integrated within the seat structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inserts are added to provide conformability and pressure relief, then comfort is improved, but device complexity increases
Solution Approach 1:
The insert is nested within the molded foam seat structure, with the insert positioned inside a cavity formed by the molding process. This nesting approach integrates the comfort-enhancing insert into the seat without adding external complexity, as the insert becomes an internal component of the unified seat assembly.
Solution Approach 2:
The molding process combines the insert and foam material into a single integrated seat structure. The insert and surrounding foam are merged during manufacturing to form a unified component with seamless transitions, eliminating the need for separate assembly steps and reducing overall structural complexity.
2Strength
If inserts are embedded within the foam, then structural integrity is improved, but manufacturing complexity increases
Solution Approach 1:
The insert is prepared and positioned in advance within the mold cavity before the foam material is injected. This preliminary positioning ensures the insert is correctly placed and secured before the molding process begins, allowing the foam to encapsulate the insert seamlessly and maintain structural integrity without requiring complex post-manufacturing assembly steps.
3Adaptability or versatility
If heating elements are integrated into the insert, then functionality is improved, but device complexity increases
Solution Approach 1:
The insert serves multiple functions: it provides pressure relief through its contoured design, offers conformability through its material properties, and delivers heating functionality through integrated heating elements. This multi-functionality consolidates several features into a single component, reducing overall system complexity despite the added functionality.
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 provides a more comfortable seat with enhanced conformability and springiness, reduced pressure on sensitive areas, and improved durability by embedding the inserts within the foam, creating a seamless transition between firm and soft areas without compromising the seat's aesthetics or structural integrity.
Implementation Method 1
Polyurethane, produced by combining monomers including isocyanate functional groups and hydroxyl groups, is a known material for forming resilient seating of all types
Implementation Method 2
the reacting liquid is dispensed into the mold and allowed to cure
Implementation Method 3
material that conforms to the contours of the user's body over a period of time
Implementation Method 4
has certain 'rebound' properties (or spring-like performance)
Implementation Method 5
Other insert embodiments may include heating elements
Data Source
AI summary
A seat incorporating insert(s) intermediate its upper and lower surfaces. A seat insert for the support of the users buttocks conforms to the user's body, has “rebound” properties, and areas adapted to underlie the perineum and/or ischiums of a user softer than the rest of the seat insert. Alternatively, a perineal insert and/or ischium inserts may be used without the seat insert described. Finally, a heatable insert can be used in conjunction with or in the absence of said seat inserts to provide heat for the comfort of a seat user. In all cases, the aforesaid inserts are preferably completely encapsulated and enclosed by the foam materials making up the seat, which can be accomplished by molding the seat around the insert(s), creating a seat with various internal density zones, adjustable heat, and enhanced abilities to conform to the user's body, while limiting pressure on perineum and/or ischiums.