Leg Press Machine with Adjustable Rotating Bars and Seat
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Solution Overview
Problem
Existing leg press machines, such as Habing, are not adjustable to accommodate users of different body types and dimensions, leading to uneven resistance and potential strain on the legs and lower back due to fixed seat angles and non-adjustable seat positions.
Innovation Solution
A leg press exercise machine with rotating bars angled between 0 to 30 degrees and a seat support bar angled between 20 to 60 degrees, allowing for adjustable seat movement and a full-width footplate, enabling users to perform exercises comfortably and safely by distributing resistance evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the seat is fixed at a steep angle (approximately 30 degrees) to the ground, then the machine structure is simplified, but the resistance on the user's legs becomes too heavy too quickly as the user straightens their legs
Solution Approach 1:
The patent applies the dynamics principle by making the seat angle adjustable rather than fixed. The seat can be adjusted to different angles (0-30 degrees from vertical) to accommodate users with different body types and leg lengths. This dynamic adjustment allows the resistance curve to be optimized for each user, preventing the resistance from becoming too heavy too quickly during the leg press motion.
2Device complexity
If the seat is not adjustable back and forth on the support, then the machine structure is simplified, but shorter users are forced to begin the exercise with their legs comparatively more straightened out whereas taller users will be forced to begin with their legs comparatively more crunched up
Solution Approach 1:
The seat is made dynamically adjustable along the support bar, allowing users to position the seat at different locations to match their body dimensions. This adjustment capability enables both shorter and taller users to start the exercise with their legs at optimal angles, improving adaptability without significantly complicating the machine structure.
Solution Approach 2:
The patent changes the parameter of seat position along the support bar to accommodate different user body types. By allowing the seat position to vary, the machine can optimize the starting leg angle for each user, whether they have shorter or longer legs, thereby improving versatility.
3Force
If the rotating bars are at a steeper angle to the vertical, then the resistance increases, but the overall machine structure becomes more compact
Solution Approach 1:
The patent applies parameter changes by allowing the rotating bars to be adjusted in angle (0-30 degrees from vertical). This enables optimization of the resistance force according to user needs and body type, while also allowing adjustment of the machine's effective footprint. The adjustable angle provides a trade-off mechanism between resistance magnitude and structural dimensions.
Data Source
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AI summary
A leg press exercise machine, including: a main frame with first and second rotating bars connected thereto; a support assembly connected to each of the first and second rotating bars, wherein rotation of the first and second rotating bars causes the support assembly to move with respect to the main frame; a seat support bar; and a seat mounted onto the seat support bar, wherein the support assembly holds the seat support bar at a downward angle and wherein the rotating bars are disposed at an angle from 0 to 30 or about 20 degrees to the vertical when the machine is in its rest position.