Reformer Resistance Linkage With Strain Relief Adjustment
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Solution Overview
Problem
Existing exercise machines, particularly Pilates reformers, face difficulties in changing resistance levels, adjusting machine configurations, and accommodating different exercises due to complexities in altering resistance settings and rope lengths.
Innovation Solution
The exercise machine incorporates mechanisms for easy resistance level adjustment, tilt adjustment of the footbar, and rope length adjustment, allowing seamless transitions between exercises by minimizing tension in the resistance cable during initial pedal positions and using linkage systems for smooth resistance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resistance levels are adjusted by changing cable tension, then resistance force magnitude changes, but adjustment complexity and difficulty increase
Solution Approach 1:
The patent changes the physical state of the resistance cable from tensioned to slack by moving the carriage to different positions on the rail. This parameter change (cable tension state) enables easy resistance adjustment without complex mechanical mechanisms, as the cable naturally transitions between taut and slack states based on carriage position
Solution Approach 2:
The carriage acts as an intermediary element between the resistance cable and the exercise mechanism. By positioning the carriage at specific locations along the rail, the system mediates the resistance cable's tension state, thereby controlling resistance levels without requiring direct adjustment mechanisms on the cable itself
2Reliability
If resistance cable remains tensioned during adjustment, then resistance force is maintained, but movement smoothness and ease of adjustment decrease
Solution Approach 1:
The resistance cable periodically transitions between tensioned and slack states as the carriage moves along the rail. During exercise, the cable is tensioned to provide resistance; during adjustment, the carriage position changes to allow the cable to go slack, enabling smooth adjustment without binding or resistance interference
Solution Approach 2:
The system preliminarily positions the carriage at specific rail locations to pre-establish the desired resistance level before exercise begins. This preliminary positioning action sets the cable tension state in advance, allowing seamless transition to exercise without requiring adjustment during active use
Data Source
AI summary
A device for use with an exerciser device, such as a reformer, which permits the adjustment of a resistance system, even when connected to a resistance source, by selectively relieving the resistance force imparted on the resistance adjustment system when changing the resistance and automatically reengaging the resistance force when exercising. A strain relief is coupled to a linkage between the resistance source and the resistance adjuster. When engaged, the strain relief selectively reduces the resistance force transmitted through the linkage to the resistance adjuster to permit movement of the resistance adjuster relative to the purchase. When disengaged the strain relief permits transmission of the resistance force through the linkage to the resistance adjuster.