Exercise Apparatus Seat With Translational Pivot Gap Control
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Solution Overview
Problem
Exercise apparatus seats lack a mechanism to efficiently adjust the position of the seatback and seatbottom independently while maintaining a consistent gap between them, limiting user comfort and adaptability.
Innovation Solution
A seat design featuring a pivotally mounted seatbottom and seatback with a translational pivot connecting them, allowing for independent adjustment via a guide track and telescopic support post, enabling the seatback to pivot between upright and reclined positions while maintaining a minimum gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seatback and seatbottom are adjusted independently using traditional mechanisms, then the positioning flexibility is improved, but the structural complexity and difficulty of maintaining consistent gap increases
Solution Approach 1:
The seat structure is divided into two independently adjustable components: the seatbottom (34) and the seatback (36). Each component can be adjusted separately through dedicated mechanisms (telescopic support post 50 for seatbottom, pivot mechanism 48 for seatback), allowing independent positioning while maintaining overall system simplicity through modular design
Solution Approach 2:
A translational pivot (46) acts as an intermediary mechanism connecting the seatbottom and seatback. This pivot translates rotational motion into linear motion, enabling the seatback to pivot between upright and reclined positions while automatically maintaining a consistent minimum gap through the guide track (44) constraint, thereby simplifying the overall adjustment mechanism
2Ease of operation
If a mechanism is added to maintain consistent gap between seatback and seatbottom, then the user comfort is improved, but the device complexity increases
Solution Approach 1:
The guide track (44) and translational pivot (46) create a dynamic constraint system that automatically maintains the minimum gap between seatback and seatbottom during adjustment. As the seatback pivots or the seatbottom telescopes, the guide track ensures the components move in coordination, dynamically preserving the gap without requiring additional active control mechanisms
Solution Approach 2:
The translational pivot (46) mounted on the guide track (44) creates a mechanical constraint that equalizes the positioning relationship between seatback and seatbottom. The guide track's geometry ensures that both components remain in optimal positional relationship throughout their range of motion, maintaining user comfort through equipotential positioning
Data Source
AI summary
An exercise apparatus seat includes a seatbottom and a seatback each pivoted to a support frame at respective first and second stationary pivots, and coupled to each other at a third translational pivot.