Pectoral Exerciser With Independent Weight Adjustment
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Solution Overview
Problem
Existing pectoral weight exercisers do not allow for individual adjustment of weights on each side of the body, leading to imbalanced muscle development, where one pectoral muscle may become larger than the other.
Innovation Solution
A pectoral exerciser with left and right individually adjustable weights, featuring a frame with pivotally connected rotation arms, adjustable front weight assemblies, and a selector body pin system that allows for multiple weight settings, enabling precise adjustment of weight on each side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fixed weight exercisers are used, then the structure is simple, but individual weight adjustment on each side is not possible leading to imbalanced muscle development
Solution Approach 1:
The weight exerciser is divided into independent left and right sides, each with separate weight stacks, selector mechanisms, and adjustment links. This segmentation allows independent weight adjustment on each side while maintaining a relatively simple overall structure by repeating proven mechanical components.
Solution Approach 2:
The patent implements dynamic adjustability through the selector body pin system that can engage different holes in the adjustment link, allowing the weight configuration to be changed during operation. The pivotally connected components provide dynamic movement while maintaining structural integrity.
2Ease of operation
If individually adjustable weights are implemented, then balanced muscle development is enabled, but the device complexity increases
Solution Approach 1:
The selector body pin system is designed to be user-operated without requiring external assistance or complex control systems. The user can independently adjust the weight on each side by moving the selector body pin to the desired hole position, making the system self-serving and easy to operate.
Solution Approach 2:
The patent changes the weight parameter independently on each side through the adjustable selector mechanism. By allowing different weight configurations (e.g., heavier on one side, lighter on the other), the system enables customized exercise parameters to address imbalanced muscle development.
3Adaptability or versatility
If multiple weight settings are provided, then versatility is improved, but the mechanism complexity increases
Solution Approach 1:
The selector body pin mechanism serves multiple functions: it selects weight positions, engages with the adjustment link, and provides tactile feedback for proper engagement. This multi-functional design reduces the need for separate mechanisms for each function, thereby reducing overall complexity while providing multiple weight settings.
Solution Approach 2:
The adjustment link acts as an intermediary component between the weight stack and the selector body pin. It translates the selector pin's position into corresponding weight configurations, simplifying the overall mechanism by providing a mechanical mediation layer that reduces direct complexity between the selector and weight components.
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 balanced muscle development by allowing for independent adjustment of weights on each side, rebalancing and reshaping the shoulder and pectoral muscles, and providing the ability to change perceived weight without restacking weight plates.
Implementation Method 1
A foot spotter lever is actuated by a foot pedal to actuate a foot spotter link to rotate a foot spotter bar
Implementation Method 2
The four-bar linkage mechanisms are pivotably mounted at their rearward ends about axes which are disposed at an angle relative to a horizontal plane
Data Source
AI summary
A right rotation arm is mounted to the frame at a right rotation arm main joint. The right rotation arm has a right rotation arm upper bar. The right rotation arm upper bar is mounted above the base. The left rotation arm is mounted to the frame at a left rotation arm main joint. The left rotation arm has a left rotation arm upper bar. The left rotation arm upper bar is mounted above the base. The right front weight swivel member is pivotally connected to the right rotation arm upper bar at a right front weight retainer pivot. The left front weight swivel member is pivotally connected to the left rotation arm upper bar at a left front weight retainer pivot.