Adjustable Stride Elliptical Exerciser Mechanism
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Solution Overview
Problem
Conventional indoor exercise machines, such as elliptical exercisers, have fixed foot movement trajectories, leading to potential muscle soreness and sports injuries due to poorly designed gait alignment.
Innovation Solution
An elliptical exerciser with an adjustable stride length mechanism, featuring a rotatable fixing segment and manual swing lever, allows for adjustment of the foot movement trajectory and stride length by changing the horizontal distance and arcuate swing length of the movement path, creating an elliptical-like path with upper and lower sections to enhance ergonomics and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the exercise machine uses a fixed gait trajectory, then the structure is simple, but it causes muscle soreness and sports injuries due to poor gait alignment
Solution Approach 1:
The patent applies the dynamics principle by making the gait trajectory adjustable rather than fixed. The movement trajectory is designed to be dynamically configurable through an adjustment mechanism that allows users to modify the elliptical path parameters, transforming the static trajectory into a dynamic, adaptable motion pattern that can be optimized for different users' gait requirements.
Solution Approach 2:
The patent implements parameter changes by allowing modification of the trajectory's geometric parameters including horizontal distance, vertical distance, and arcuate swing length. These parameter adjustments enable the system to adapt the movement path to match different users' natural gait patterns, thereby improving gait alignment and reducing the risk of muscle soreness and injuries.
2Adaptability or versatility
If the trajectory is not adjustable, then the device is simple to operate, but it cannot adapt to different users' gait patterns leading to sports injuries
Solution Approach 1:
The system transforms from a static, fixed trajectory to a dynamic, adjustable trajectory that can adapt to different users' gait patterns. The adjustment mechanism enables real-time modification of the elliptical path parameters, allowing the exercise machine to accommodate individual user requirements and preferences.
Solution Approach 2:
The patent enables adaptability by allowing users to modify key trajectory parameters including horizontal distance, vertical distance, and arcuate swing length. These parameter changes permit the system to customize the movement path to match different users' natural gait patterns, thereby improving adaptability while managing device complexity through user-friendly adjustment controls.
3Ease of operation
If the foot movement trajectory is fixed, then the structure is simple, but it creates an unnatural movement pattern causing muscle soreness
Solution Approach 1:
The patent addresses natural movement by enabling parameter changes in the movement path, specifically adjusting horizontal distance, vertical distance, and arcuate swing length. These adjustments allow the trajectory to be customized to match the user's natural gait pattern, creating a more comfortable and natural movement experience that reduces muscle soreness.
Solution Approach 2:
The system transitions from a fixed, rigid trajectory to a dynamic, adaptable movement path that responds to user needs. The adjustment mechanism enables the trajectory to be modified dynamically, allowing users to optimize the movement pattern for their natural gait and reduce the risk of muscle soreness and discomfort.
Data Source
AI summary
An elliptical exerciser capable of adjusting a stride length contains: frame, a transmission device, a crank mechanism, and an adjustable movement unit. The transmission device is connected on the pedestal and includes a pulley. The crank mechanism is coaxial with the pulley of the transmission device and is rotatably connected on the frame. The adjustable movement unit is rotatably connected on the frame and is coupled with the transmission device via the crank mechanism. The adjustable movement unit includes two four-connection-rod assemblies which are located on two sides of the frame, and a respective four-connection-rod assembly of the adjustable movement unit has an adjustment lever, a post, a manual swing lever, and a horizontal joining rod. The adjustment lever has multiple rotatable connection points which are spaced, and the manual swing lever is rotatably connected on the frame.