Pivoting Armrest Rocking Chair for Seated Abdominal Exercise
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Solution Overview
Problem
Existing abdominal exercise solutions are either too intense for long duration use, incompatible with other activities, or fail to engage upper body muscles effectively, especially when used in a sitting position.
Innovation Solution
A low-elevation rocking chair with pivotable armrests that provide a crunch-type exercise motion using the user's body weight for resistance, allowing for engagement of upper body muscles through a natural rocking motion that can be combined with other activities like watching TV or working.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If traditional abdominal exercise devices are used, then abdominal muscle engagement is effective, but they cannot be used for long duration or combined with other activities
Solution Approach 1:
The rocking chair combines exercise functionality with leisure functionality, allowing users to perform abdominal exercises while simultaneously engaging in other activities such as watching television or reading. The chair serves dual purposes: providing a comfortable seating option and delivering effective abdominal workout through the rocking mechanism.
Solution Approach 2:
The patent merges the exercise function with the seating function into a single integrated device. The rocking chair combines the leisure activity of sitting and watching TV with the exercise function of abdominal crunches, allowing both activities to occur simultaneously without requiring separate equipment.
2Ease of operation
If leg actuated rocking mechanisms are used, then rocking motion is achieved, but upper body muscles are not engaged
Solution Approach 1:
The rocking mechanism is segmented into independent components: the seat rockers provide passive rocking motion while the armrest cranks provide active upper body exercise. This segmentation allows the lower body to passively rock while the upper body actively engages in crunching motions, simultaneously achieving both rocking motion and upper body muscle engagement.
Solution Approach 2:
The armrest cranks act as an intermediary mechanism that translates upper body arm movements into rotational exercise while simultaneously driving the rocking motion. The cranks mediate between the user's upper body effort and the seat's rocking movement, converting arm motion into both rocking and abdominal exercise.
3Force
If high intensity exercise is provided, then abdominal workout effectiveness is improved, but it becomes too intense for long duration use
Solution Approach 1:
The exercise intensity is made dynamic and adjustable through the crank mechanism, allowing users to vary the resistance and motion amplitude. The system transitions between passive rocking (low intensity) and active crunching (high intensity) modes, enabling users to adjust intensity levels to match their fitness goals and duration requirements.
Solution Approach 2:
The exercise delivers periodic abdominal engagement through the rhythmic rocking motion combined with crank rotation. The intermittent nature of the crunching action, synchronized with the rocking cycle, provides effective muscle stimulation while allowing brief recovery periods between cycles, enabling longer duration use compared to continuous high-intensity exercise.
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 comfortable abdominal exercise that can be integrated into daily activities, providing a kinesthetically pleasurable experience while engaging both upper and lower body muscles effectively, suitable for long duration use.
Implementation Method 1
Armrest handle actuation also shifts the user's center of mass longitudinally, which in turn initiates a natural rocking motion by gravity
Implementation Method 2
The inertial dynamics of the resulting motion are inherently kinesthetically pleasurable
Implementation Method 3
The resistance is provided by the user's own body weight with variation through differential leverage
Data Source
AI summary
A rocking chair provides abdominal exercise by user actuation of pivotal armrest handles that are configured to provide a crunch type exercise motion. The arrangement of internal pivot frames is such that armrest handle actuation shifts the user's center of mass both vertically and longitudinally, which in turn initiates a natural rocking motion by gravity. The inertial dynamics of the resulting motion are inherently kinesthetically pleasurable. The resistance is provided by the user's own body weight with variation through differential leverage. Alternatively, the configuration of the armrest handles is such that a user may benefit from an isometric exercise by simply holding them stationary in a conventional armrest position.