Vehicle Seat Joint Assembly for Zero-Gravity Positioning
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Solution Overview
Problem
Existing vehicular seat positioning systems lack efficient mechanisms to adjust seat positions, particularly for achieving ergonomic comfort and stress relief, such as the zero-gravity position, without compromising structural integrity and ease of assembly.
Innovation Solution
A subassembly comprising an actuator, first and second guides, and a joint assembly that allows for the translation and rotation of seat components, utilizing spindles and annular linkages to pivot and extend the seat frame, driven by a motor or gearbox for precise seat adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex seat positioning mechanism is used to achieve ergonomic adjustments, then seat adjustment capability is improved, but device complexity increases
Solution Approach 1:
The seat positioning system is divided into multiple independent adjustment mechanisms: a first mechanism for adjusting the seat pan angle and a second mechanism for adjusting the seat back angle. Each mechanism operates independently with its own actuator, guides, and joint assembly, allowing ergonomic adjustments without requiring a single complex positioning system.
Solution Approach 2:
The patent employs dynamic adjustment capabilities where the seat components can be repositioned during vehicle operation. The actuators enable continuous movement between multiple positions, allowing the seat to adapt to different driving conditions and occupant preferences, transforming a static seat into a dynamically adjustable positioning system.
2Manufacturing precision
If multiple guides and joint assemblies are used for precise seat positioning, then positioning precision is improved, but ease of assembly deteriorates
Solution Approach 1:
The positioning system is segmented into modular assemblies including separate guide mechanisms and joint units that can be manufactured and tested independently before final assembly. This modular approach maintains positioning precision while improving ease of assembly through standardized interfaces and independent component fabrication.
Solution Approach 2:
The patent introduces intermediate guide assemblies that act as mediators between the actuators and the seat components. These guides translate rotational actuator movement into precise linear or angular displacement of the seat, achieving high positioning precision while simplifying the overall assembly process through standardized intermediate components.
3Adaptability or versatility
If actuators and guide mechanisms are integrated for seat adjustment, then seat adjustment capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the actuator, guide mechanism, and joint assembly into integrated units for each seat adjustment function. The first actuator with its associated guides and joints forms a complete assembly for seat pan adjustment, while the second actuator forms a complete assembly for seat back adjustment, merging multiple functions into cohesive modular units that reduce overall system 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
Enables ergonomic seat adjustments, such as achieving a zero-gravity position, while maintaining structural stability and ease of assembly, enhancing occupant comfort and usability.
Implementation Method 1
The actuator is configured to be assembled in a seat assembly and defines a rotary axis
Implementation Method 2
The first guide includes a spindle or an annular linkage, and the second guide includes the other of the spindle or the annular linkage. The spindle and annular linkage cooperate such that during actuation of the actuator the annular linkage translates relative to the spindle
Implementation Method 3
The joint includes a first arm pivotally attached to the second arm at a pivot point. The first arm is connected to a seat frame, the second arm is connected to a base of a seat assembly
Data Source
AI summary
Seat assemblies and subassemblies such as for a vehicle are disclosed. The subassemblies may include joint assembly with a motor configured to move the seat assembly from a first position to a second position via the coordination between a rotating spindle and ring disposed around the spindle. The joint assembly may move an occupant to a predetermined position such as the zero-gravity position for greater comfort during extended use or lengthy travel.