Segmented Arm Assembly with Eccentric Pivot for Adjustable Fitness Torque
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Solution Overview
Problem
Conventional fitness equipment arm members have fixed tension arm lengths and disposing angles, limiting user adjustability and versatility, restricting the range of torque and applied force, and lacking modular installation options for different exercising purposes.
Innovation Solution
A mountable arm assembly with two interconnected arm members and a connector allowing adjustable tension arm length and disposing angle, featuring multiple assembly portions and eccentric positioning elements for customizable force application and resistance, enabling modular installation on various fitness equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tension arm length is fixed in conventional fitness equipment, then the structure is simple and easy to manufacture, but the user cannot adjust the arm length to suit different training needs
Solution Approach 1:
The arm member is divided into a first arm member and a second arm member that can be separated and reconnected at different positions. The first arm member has a first connecting portion with multiple first connecting holes, while the second arm member has a second connecting portion with multiple second connecting holes. This segmentation allows users to adjust the effective length by connecting at different hole combinations, providing adaptability without requiring a completely redesignable arm structure.
Solution Approach 2:
The arm member transitions from a fixed-length rigid structure to a dynamically adjustable structure. The adjustable connecting portions allow the user to change the effective length of the arm member based on training requirements, making the structure adaptable rather than static. This dynamic adjustment capability resolves the contradiction between simplicity and adaptability.
2Adaptability or versatility
If the disposing angle of the arm member is fixed by the designer, then the manufacturing is straightforward, but the user cannot adjust the angle for different exercise purposes
Solution Approach 1:
The arm member is segmented into two separate arm members with adjustable connecting portions. The first connecting portion and second connecting portion can be positioned at different angles relative to each other when connected, allowing the user to adjust the disposing angle. This segmentation enables angle adjustment without requiring a complex articulated joint mechanism within a single rigid arm.
Solution Approach 2:
The disposing angle of the arm member becomes dynamically adjustable rather than fixed. By connecting the first and second arm members at different angular orientations through the adjustable connecting portions, the user can modify the disposing angle to suit different exercise requirements, transforming the static structure into a dynamically adaptable one.
3Adaptability or versatility
If the arm member is designed for specific exercising purposes only, then the design is simple and targeted, but the equipment lacks versatility for different muscle groups and training intensities
Solution Approach 1:
The arm member is designed with universal adaptability through multiple first connecting holes and second connecting holes arranged in different positions and orientations. This allows the same arm member structure to be configured for different exercise purposes by changing the connection configuration, enabling one piece of equipment to serve multiple muscle groups and training intensities without requiring multiple specialized arm members.
4Adaptability or versatility
If the arm member position is fixed for installation, then the installation is simple, but the user cannot change the installation position for different exercising purposes
Solution Approach 1:
The arm member is segmented with separate first and second arm members that can be independently positioned and connected. The multiple connecting holes in each arm member allow for flexible positioning during installation, enabling the user to adjust the installation position and orientation to suit different exercise requirements without requiring a completely reconfigurable mounting system.
Data Source
AI summary
A mountable arm assembly for fitness equipment, comprises two arm members and a connector for pivot connection of the two arm members. The two arm members respectively provide a plurality of assembly portions for length adjustment of the tension arm. The connector is formed with a pivot connection portion and a plurality of eccentric positioning portions. Specifically, an adjustable disposing angle is formed between the two arm members, and the two arm members set the disposing angle through the one the eccentric positioning portions. The arm assembly can be mounted on fitness equipment and can swing back and forth through the pivot connection portion. The users can select one assembly portion on each of the two arm members for required tension arm lengths and add an applied force and a resistance force respectively on the two assembly portions.