Rotating Grip Exercise Bar With Elastic Resistance
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Solution Overview
Problem
Conventional barbells with fixed, linear grip portions can lead to strain and injury during weightlifting exercises, particularly due to the inability of the grip to rotate naturally with the wrist as the barbell is lifted.
Innovation Solution
An exercise bar assembly featuring rotating grip assemblies with an elastic element, such as an elongated elastic band, that provides resistance and allows the hand grips to rotate between positions perpendicular and aligned with the longitudinal axis, accommodating natural wrist rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed, linear grip portion is used on a barbell, then the structure is simple and stable, but the wrist and forearm experience excessive torsion and strain during exercise
Solution Approach 1:
The grip portion is transformed from a fixed, static structure to a dynamic one that can rotate. The hand grip is mounted on a rotating mechanism that allows it to pivot and adjust its orientation during the exercise motion, enabling the grip to adapt to the natural rotation of the wrist and forearm while maintaining structural stability through controlled movement.
Solution Approach 2:
The barbell is divided into separate functional components: a fixed bar body and a independently rotatable hand grip portion. This segmentation allows the grip portion to rotate independently to accommodate wrist motion, while the main bar structure remains stable and provides the necessary structural support.
2Device complexity
If the grip portion is fixed in position, then the device structure is simple, but the grip cannot accommodate natural wrist rotation during exercise
Solution Approach 1:
The grip mechanism incorporates rotational freedom allowing the hand grip to dynamically adjust its angular position during exercise. This dynamic capability enables the grip to follow the natural arc of wrist rotation while maintaining secure contact with the user's hand throughout the range of motion.
3Productivity
If an elastic element is added to provide resistance to rotation, then the exercise effectiveness is improved, but the device complexity increases
Solution Approach 1:
An elastic element is introduced as an intermediary component between the hand grip and the bar body. This elastic element provides rotational resistance that challenges the user's muscles while allowing controlled movement. The elastic resistance mechanism adds minimal structural complexity compared to rigid locking mechanisms, as it uses simple elastic deformation to provide the desired resistance force.
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 rotating grip assemblies with elastic resistance enable a full range of motion for the biceps, reducing strain and the risk of injury while providing an effective resistance exercise throughout the full range of motion.
Implementation Method 1
an elastic element, such as an elongated elastic band, that provides resistance and allows the hand grips to rotate
Data Source
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AI summary
An exercise bar assembly includes a pair of rotating grip assemblies, each including a generally planar frame and a hand grip mounted within the frame for rotation within in the plane of the frame. The rotating grip assemblies are attachable to opposite ends of a center bar assembly along the longitudinal axis of the bar assembly. A plate bar assembly is attachable to each of the rotating grip assemblies opposite the center rod, with the plate bar assembly aligned with the longitudinal axis to form a weight lifting bar. A user-selectable elastic band is engageable between the pair of rotating grip assemblies along the longitudinal axis so that the elastic band resists rotation of each hand grip in each of the rotating grip assemblies. The rotating grip assemblies of the exercise bar assembly allow for the full range of motion of the bicep, and the elastic band creates a resistance exercise through the bicep's full range of motion.