Elliptical Flywheel Training Device for Lower Arm-Swing Force Peaks
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Solution Overview
Problem
Existing training devices for arm and shoulder muscles during running activities, such as dumbbells and flywheel rings, cause overloading and negative effects on running technique due to high force peaks at arm swing reversal points, leading to musculoskeletal injuries and technique disruption.
Innovation Solution
A training device with a flywheel mass member guide forming an elliptical path deviating from a circular shape, allowing a handle axis outside the path, which adapts to swing and reversal phases, and a handle member positioned to optimize lever arm direction and reduce load peaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If dumbbells are used as training devices during jogging, then additional muscle training effect is achieved, but high force peaks at arm swing reversal points cause overloading and injury to musculoskeletal system
Solution Approach 1:
The patent employs a flywheel mass member that moves along a curved elliptical path instead of a straight line, creating a rolling motion that smooths out force peaks. The curved trajectory of the flywheel mass member during arm swing reduces impact forces on the musculoskeletal system while maintaining training effectiveness
Solution Approach 2:
The training device uses a dynamic flywheel mass member that can move freely along the elliptical guide path, allowing the mass distribution to change dynamically during arm swing. This dynamic movement adapts to the running rhythm and reduces force peaks at reversal points compared to static dumbbells
2Object-affected harmful factors
If flywheel mass moves along circular path, then delayed acceleration reduces tearing on muscles and joints, but force peaks increase again with increasing running speed
Solution Approach 1:
The patent uses an elliptical path for the flywheel mass member instead of a circular path. The elliptical geometry creates asymmetric acceleration and deceleration phases that are better adapted to the natural arm swing during running, reducing force peaks at reversal points even at higher running speeds
3Device complexity
If handle is located internally within the running path of flywheel mass, then compact design is achieved, but lever arms directed opposite to running direction cause negative load phenomena
Solution Approach 1:
The patent extracts the handle from the interior of the flywheel mass running path and positions it externally. This separation allows the handle to be positioned optimally for gripping while the flywheel mass member moves freely along the elliptical path, eliminating negative lever arm effects that would occur with internal handle placement
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 elliptical path guide and handle configuration minimize load peaks during arm swings, enhancing ergonomic muscle training by adapting to running rhythm and reducing joint stress, thus improving running technique and safety.
Implementation Method 1
at least one flywheel mass member guide (1a) for guiding at least one flywheel mass member (2) along at least one elliptical path or an elliptical path segment deviating from a circular shape
Implementation Method 2
The delayed acceleration and deceleration of the flywheel mass reduces the tearing on the muscles and joints
Data Source
AI summary
The present invention relates to a training device (10) for training the arm muscles and muscle groups associated therewith, comprising:at least one flywheel mass member carrier (1) with at least one flywheel mass member guide (1a) for guiding at least one flywheel mass member (2) along at least one elliptical path deviating from a circular shape or at least one elliptical path segment, wherein the flywheel mass member guide (1a) forms a guide of the at least one flywheel mass member (2) extending beyond a semi-ellipse and spans a flywheel mass member guide plane (y, z) in the radial direction of the elliptical path or the elliptical path segment, andat least one handle member (6) with a handle axis (6a) to be encompassed for gripping,wherein the handle member (6) is arranged in the handle axis (6a) at least sectionally in a handle plane (6b) which extends perpendicular to the flywheel mass member guide plane (y, z) and which does not intersect the elliptical path or the elliptical path segment.