Thigh Exercise Machine Rocking User Support
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Solution Overview
Problem
Current thigh exercise machines do not allow natural hip flexion and tilting during exercises, leading to stress on the low back and groin muscles due to a stationary user support.
Innovation Solution
A thigh exercise machine with a pivotally mounted user support and rotating exercise arms, connected by linkages that translate arm movement into a rocking motion of the user support, allowing the user to adjust posture naturally during exercises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the user support is made stationary to provide stable support during exercise, then stability is improved, but natural hip flexion and tilting are restricted causing stress on low back and groin muscles
Solution Approach 1:
The user support is transformed from a stationary fixed structure to a dynamic rocking structure that can move within a controlled range. The rocking motion mechanism allows the seat to tilt and flex naturally during exercise, accommodating hip movement while maintaining stability through the arc-shaped guiding path and linkage constraints.
2Object-affected harmful factors
If the user support is made movable to allow natural hip movement, then muscle stress is reduced, but device complexity increases due to additional linkages and rocking mechanism
Solution Approach 1:
The user support system is segmented into multiple functional components: the rocking seat assembly, the arc-shaped guiding linkage, the movement arms, and the thigh pads. This segmentation allows each component to perform its specific function independently while working together to achieve natural hip movement, distributing the complexity across manageable subsystems.
Solution Approach 2:
The arc-shaped guiding linkage acts as an intermediary mechanism between the stationary frame and the movable user support. It translates the user's hip movement into a controlled rocking motion along a predetermined arc path, mediating between the need for stability and the need for natural movement without requiring complex active control systems.
3Manufacturing precision
If fixed positioning is used to maintain proper exercise form, then exercise precision is improved, but adaptability to natural body movement is reduced
Solution Approach 1:
The system changes the parameter of seat position from fixed to dynamically variable within a controlled range. The rocking motion allows the seat angle and position to change continuously during exercise, adapting to the user's natural hip flexion and tilting while maintaining proper exercise form through the constraints of the arc-shaped guiding path.
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
This design reduces muscle stress in the low back and groin by enabling natural hip movement, making the exercise more comfortable and enjoyable.
Implementation Method 1
a connecting linkage which translates movement of the exercise arms into rocking movement of the user support
Implementation Method 2
A thigh exercise machine with a pivotally mounted user support
Data Source
AI summary
A thigh exercise machine has a stationary main frame, a pivotally mounted user support seat, and a pair of exercise arms mounted for rotation between inner and outer positions, each arm having a pad positioned to engage part of a user's leg such as a user's inner or outer thigh. A connecting linkage translates movement of the exercise arms into rocking movement of the user support seat. The connecting linkage is arranged so that user is positioned in an upright or slightly reclined posture when their legs are together and a more reclined posture when their legs are spread apart.