Air Resistance Baffle Mechanism for Precise Exercise Load Control
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Solution Overview
Problem
Existing exercise machines lack adjustable resistance devices that can provide precise resistance within a predetermined range, necessitating robust adjustment mechanisms to meet user demands.
Innovation Solution
A resistance device with a rotating resistance element and adjustable baffles that control airflow through a housing cavity, utilizing protrusions and guide surfaces to create variable air gaps, ensuring resistance levels are maintained within desired ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a robust adjustment device is provided to provide the correct amount of resistance, then the resistance accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent changes the physical parameter of air gap distance to control resistance. By adjusting the distance between the baffle and the resistance element, the airflow and thus the resistance are precisely controlled without complex mechanical adjustment mechanisms. This transforms a mechanical adjustment problem into a spatial parameter control problem.
Solution Approach 2:
The patent extracts the resistance adjustment function from a complex mechanical adjustment device and implements it through a simple baffle structure that controls airflow. The baffle's position relative to the resistance element creates the necessary resistance variation without requiring robust adjustment mechanisms.
2Adaptability or versatility
If adjustable baffles are used to control airflow, then the resistance adjustability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The baffle is designed to be movable rather than fixed, allowing dynamic adjustment of the air gap. This dynamic structure enables resistance adjustment while the simple geometric relationships and standardized components keep manufacturing precision requirements manageable.
3Measurement precision
If the air gap between components is reduced to adjust resistance, then the resistance precision is improved, but the assembly tolerance requirements increase
Solution Approach 1:
The baffle structure creates a localized air gap control zone between itself and the resistance element. By concentrating the resistance control function in this specific local region, the patent achieves precise resistance control without requiring high precision across the entire assembly, thus reducing overall assembly tolerance requirements.
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 user-adjustable resistance settings within precise predetermined ranges, enhancing the user experience by providing consistent and customizable workout resistance.
Implementation Method 1
a resistance element that may rotate within the housing to create resistance for a user... resistance of the resistance device may be dependent upon airflow through the air inlet
Implementation Method 2
The protrusion may contact the guide surface to create a gap between the inner member and the flange to adjust the amount of air allowed to enter the inner cavity
Data Source
AI summary
A resistance device for an exercise machine may include a resistance element such as a fan or impeller that rotates within a cavity of a housing to produce resistance to a user's input. The resistance levels can be adjusted by a user by adjusting a movable baffle. The movable baffle may include an adjustment mechanism comprising a contoured guide surface that interacts with a protrusion on an adjacent component to move a portion of an outer region of the movable baffle outward to allow additional air into the cavity of the housing to adjust the resistance of the resistance device.