Pivoting Treadmill Guard Assembly for Under-Belt Object Detection
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Solution Overview
Problem
Existing treadmill safety mechanisms often fail to effectively prevent objects from entering the area under the moving surface, leading to potential hazards and inefficient operation adjustments.
Innovation Solution
A guard assembly with a pivoting guard and sensor-based detection mechanisms, such as infrared beams and accelerometers, is attached to the rear of the treadmill to detect and prevent objects from entering the underside, triggering operational adjustments like slowing or stopping the belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety mechanisms (keys, simple switches) are used, then the treadmill can stop operation during unsafe conditions, but these mechanisms fail to detect objects entering the area under the moving surface
Solution Approach 1:
The patent replaces traditional mechanical safety switches and keys with optical sensors (infrared beams) and electronic detection systems. The sensor assembly detects objects under the moving surface using optical fields rather than mechanical contact, enabling more reliable hazard detection without requiring complex mechanical linkages or multiple switch components.
Solution Approach 2:
The patent introduces sensor assemblies with infrared beams as intermediary detection elements between the user and the moving surface. These sensors act as mediators that detect objects in the hazardous area without requiring direct mechanical interaction, providing safety through electronic mediation rather than mechanical switching.
2Reliability
If guard assemblies with sensors are added to detect objects, then object detection capability improves, but the device complexity increases
Solution Approach 1:
The sensor assembly is designed to perform multiple functions: detecting objects under the moving surface, triggering belt slowdown or stop, and potentially detecting user presence. By consolidating these detection functions into a single multi-functional assembly rather than separate mechanisms for each function, the patent reduces overall system complexity while maintaining comprehensive safety coverage.
Solution Approach 2:
The patent combines the guard structure with integrated sensor assemblies, merging the protective barrier function with the detection function into a single unified assembly. This integration eliminates the need for separate guard structures and separate detection systems, reducing the number of components and simplifying the overall device architecture.
3Loss of time
If the treadmill uses simple safety switches, then the device complexity remains low, but the response time to detect hazards is delayed
Solution Approach 1:
The patent replaces mechanical switches with optical sensors and electronic detection circuits that respond almost instantaneously to object presence. Optical sensors detect objects through infrared beam interruption without the mechanical contact delays inherent in traditional switches, providing faster safety response times while using electronic rather than mechanical systems.
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
Effectively prevents objects from moving under the treadmill, ensuring user safety and maintaining efficient operation by promptly adjusting treadmill functions.
Implementation Method 1
sensor-based detection mechanisms, such as infrared beams
Data Source
AI summary
Various devices, systems, methods, and apparatuses utilize mechanical assemblies to prevent, detect, and/or mitigate objects from entering or moving close to or under a treadmill or exercise machine. In some embodiments, a guard, or guard assembly, is attached or otherwise fixed to a rear area of a treadmill. The guard assembly may include an end cap and pivoting guard configured to be retrofit to existing treadmills, such as to a rear end or area of a deck or frame of a treadmill.