Multifunctional Leg Training Machine with Adjustable Weight and Safety
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Solution Overview
Problem
Existing leg training machines, such as weightlifting racks and Smith machines, lack safety features and versatility to effectively perform squat, lunge, and calf-raise exercises without risking injury from excessive load or poor posture.
Innovation Solution
A multifunctional leg training machine with a weight-bearing mechanism that includes a longitudinal sliding device and a transverse sliding device, equipped with positioning and buffering mechanisms, allowing users to perform various exercises while ensuring safety and full muscle group training through adjustable weight distribution and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a weightlifting rack is used for leg exercises, then the structure is simple and easy to manufacture, but safety facilities are lacking and users risk injury from excessive load or poor posture
Solution Approach 1:
The patent incorporates safety facilities including spotter arms and safety bars that are pre-installed on the framework. These safety mechanisms are positioned in advance to catch the barbell if the user fails, preventing injury from excessive load without requiring complex active control systems.
Solution Approach 2:
The patent introduces a barbell as an intermediary element between the user and the weightlifting rack. The barbell works in conjunction with safety bars and spotter arms to distribute and control the load, providing a safety mediation layer that reduces direct risk to the user while maintaining structural simplicity.
2Adaptability or versatility
If a Smith machine is used for weight training, then upward movement is stabilized without vibration, but the machine only allows simple upward lifting and cannot effectively train different muscle groups of the legs
Solution Approach 1:
The patent designs a multi-functional leg training machine that can perform squat exercises, lunge exercises, calf-raise exercises, and mixed training exercises. The framework incorporates multiple exercise stations and adjustable components that allow the same machine to target different muscle groups (quadriceps, hamstrings, calves, glutes) without requiring separate dedicated machines for each exercise type.
Solution Approach 2:
The patent divides the training machine into separate functional modules including a squat station with barbell rack, a lunge station with weight holders, and a calf-raise station. Each module can be independently adjusted and used, allowing users to perform different exercises with the same overall structure while maintaining relative simplicity through modular design.
3Reliability
If direct barbell carrying on shoulders is used, then the training method is simple, but there are no safety facilities and users can be crushed by the barbell if unable to withstand the load
Solution Approach 1:
The patent pre-installs safety bars and spotter arms at predetermined positions on the framework before use. These safety facilities are positioned to automatically engage if the barbell descends too far, providing passive safety protection that requires no active user intervention while maintaining operational simplicity.
Solution Approach 2:
The safety mechanisms in the patent are designed to function automatically without requiring external assistance. The safety bars and spotter arms self-engage when the barbell reaches certain positions or fails, providing self-service safety protection that does not complicate the operation for the user.
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
Enables safe and comprehensive training of leg muscles by allowing users to perform squat, lunge, calf-raise, and mixed exercises with adjustable weight and movement, reducing the risk of injury and enhancing training variety and effectiveness.
Implementation Method 1
two sliding sleeves respectively sleeved onto the upward bars and respectively axially movable along the upward bars
Implementation Method 2
a plurality of weight plates mountable at the longitudinal sliding device set to impart a downward pressure to the longitudinal sliding device set
Data Source
AI summary
A multifunctional leg training machine includes a framework, a weight-bearing mechanism mounted at said framework and movable in direction toward or away from said framework and adapted to impart a downward pressure to the shoulders of the user using the machine, allowing the user to perform a squat exercise, a lunge exercise, a calf-raise exercise, a simple transverse body movement exercise, or a mixed training exercise of moving the body transversely and upwardly to fully train different muscle groups of the legs.