Constant Torsion Force Generator Using Coil Springs
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Solution Overview
Problem
Existing fitness equipment relies heavily on metal weights, making them heavy, costly, and difficult to move, with a risk of injury during transportation and storage, limiting their use in home settings.
Innovation Solution
A constant torque force generator using a coil spring to provide adjustable real-time constant force, reducing the need for metal weights by incorporating a rotatable power output member and constant-force coil springs, along with a clutch device and reel mechanism for adjustable resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If metal weight blocks are used to provide resistance, then the force output is stable and reliable, but the equipment becomes heavy and costly
Solution Approach 1:
The patent changes the physical state and material composition from solid metal weights to elastic coil springs. The coil springs utilize elastic deformation to generate resistance force, transforming the force generation mechanism from gravitational potential energy to elastic potential energy. This parameter change enables the same force output function with dramatically reduced weight.
Solution Approach 2:
The patent replaces the traditional mechanical weight block system with an elastic mechanism system. Instead of using heavy metal weights that rely on gravity, the invention uses coil springs that generate force through elastic deformation. This mechanical substitution achieves the same resistance function while eliminating the weight penalty.
2Force
If metal weight blocks are used to provide resistance, then the force output is stable, but the equipment is difficult to move and store
Solution Approach 1:
The patent transforms the force generation mechanism from gravitational (metal weights) to elastic (coil springs), fundamentally changing how resistance is produced. This enables the equipment to maintain stable force output while becoming lightweight and portable, as the elastic mechanism requires minimal mass to generate the same resistance levels.
Solution Approach 2:
The patent divides the resistance generation into modular coil spring units that can be independently configured. Each coil spring acts as an independent force-generating module, allowing the system to be compact and easily transported while maintaining stable resistance output through the elastic properties of the springs.
3Force
If metal weight blocks are used, then the equipment provides fixed resistance levels, but it lacks adjustability for different training needs
Solution Approach 1:
The patent introduces a dynamic control system with a controller that can actively adjust the resistance force in real-time. The controller receives signals and modifies the coil spring tension or configuration dynamically, enabling continuous adjustment of force levels to match different training requirements, unlike fixed metal weight systems.
Solution Approach 2:
The patent creates a universal force generation system where the coil spring mechanism can provide multiple resistance levels and modes through electronic control. The same physical apparatus can adapt to various training needs by adjusting control parameters, making it versatile for different users and exercise types without requiring multiple fixed weight sets.
4Weight of moving object
If coil springs are used to provide force, then the equipment weight is reduced, but the force output may vary with speed
Solution Approach 1:
The patent implements a feedback control system where sensors monitor the actual force output and speed, and the controller adjusts the coil spring tension accordingly. This closed-loop control compensates for speed-dependent variations in elastic force, maintaining consistent resistance output regardless of movement velocity.
Solution Approach 2:
The patent uses dynamic adjustment capabilities to compensate for the speed-dependent nature of elastic force. By actively modifying the coil spring configuration or pre-tension in real-time based on detected speed, the system maintains force consistency across different movement velocities, overcoming the inherent limitation of passive elastic mechanisms.
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 provides a portable, space-efficient, and cost-effective means of generating adjustable resistance, allowing for real-time constant force application, enhancing training effectiveness and safety while reducing equipment weight and storage challenges.
Implementation Method 1
at least one constant-force coil spring, arranged beside the power output member, one end thereof being immobile, and the other end thereof being fixed to the power output member
Data Source
AI summary
A constant torsion force generator and a real-time constant-force tension device. The constant torsion force generator comprises: a rotatable power output member; and constant-force coil springs (14), one end of each of the constant-force coil springs being fixed, and the other end thereof being fixed to the power output member. The real-time constant-force tension device comprises: a rotatable rotating shaft (20); a reel (40), around which a draw cord is wound, and which can drive the rotating shaft (20) to rotate; and an independent constant torsion force generator, comprising a rotatable power output member and at least one constant-force coil spring (14), wherein a power connection is formed between the power output member and the rotating shaft (20); the at least one constant-force coil spring (14) is arranged beside the power output member; and one end of each constant-force coil spring (14) is fixed, and the other end thereof is fixed to the power output member. The present invention can replace a weight to generate a torsion force and a tensile force, and has the advantages of being portable, space-efficient, easily stored, low in cost, and adjustable, providing a real-time constant force, etc.