Scissor-Arm Treadmill Platform With Resistance-Rebound Load Control
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Solution Overview
Problem
Conventional treadmills lack the ability to dynamically adjust their platform height in response to user load, leading to inefficient energy transfer and potential instability during exercise, and they do not provide real-time feedback on speed or platform displacement.
Innovation Solution
A treadmill with a vertically displaceable platform mechanism using scissor arms and linear actuators to resist downward movement and rebound upward, integrated with a displacement-based lighting system and position-sensor-based speed control to enhance user engagement and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the platform is made fixed and stable, then structural stability is improved, but the ability to dynamically adjust to user load is lost
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed platform into a dynamically adjustable one. The platform is coupled with actuators (electromagnetic, electrohydraulic, or electromechanical) that enable real-time vertical displacement in response to user load variations. This allows the platform to adapt its height and resistance dynamically while maintaining stability through controlled actuation, resolving the contradiction between fixed stability and dynamic adaptability.
2Reliability
If the platform is made vertically displaceable to resist downward movement, then user stability during exercise is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical linkage systems with modern actuation technologies (electromagnetic, electrohydraulic, or electromechanical actuators). These actuators directly control platform vertical displacement through electrical signals, eliminating the need for complex mechanical springs, levers, or linkages while maintaining user stability. This substitution reduces overall device complexity despite adding control electronics.
3Adaptability or versatility
If sensors and control systems are integrated for real-time feedback, then user engagement and safety are improved, but manufacturing cost increases
Solution Approach 1:
The patent integrates multiple functions into unified systems to reduce manufacturing complexity. The sensors serve dual purposes: detecting user load for platform displacement control and providing data for exercise program adjustment. The control system simultaneously manages actuator operation, displays exercise information, and adjusts resistance levels. This multi-functionality reduces the need for separate dedicated components, lowering overall manufacturing costs despite advanced capabilities.
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 solution allows for precise control of platform displacement, maintaining user stability and providing real-time feedback, enhancing the exercise experience by dynamically adjusting resistance and speed based on user input.
Implementation Method 1
an intermediate portion of the first scissor arm is pivotally attached to an intermediate portion of the second scissor arm so that pivoting of the first and second scissor arms with respect to one another results in support of the platform at various vertical displacements
Implementation Method 2
a resistance/rebound mechanism coupled to the base and to the platform and capable of providing displacement resistance in a first direction and rebound responsiveness in an opposite second direction
Data Source
AI summary
A treadmill has a base with a vertically displaceable platform. A mechanism is provided that resists the downward movement of the platform in response to a load applied to the platform. The mechanism also rebounds the platform upwardly with a force applied to the platform in response to a decrease of a load on the platform. A support structure enables stable vertical positioning of the platform with respect to the base.