Magnetic Set Counter With Double Cam Anti-Miscount Mechanism

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Solution Overview

Problem

Existing exercise counters are often cumbersome or require manual tracking, leading to miscounting and inconvenience during workouts.

Innovation Solution

A magnetic rotational set counter with an elastic radial double cam mechanism that allows for easy attachment to metal surfaces, featuring a number disk with notches and a ticker mechanism to prevent miscounting, and a display window for clear number display.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a magnetic rotational set counter with ticker mechanism is used, then counting accuracy is improved, but device complexity increases

Engineering Contradiction:
Improvecounting accuracyVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The ticker mechanism automatically tracks and displays the set count without requiring manual intervention. The elastic radial double cam mechanism self-regulates the rotation of the number disk, ensuring accurate counting while preventing user error. The system serves itself by using the elastic deformation and cam geometry to control the display mechanism.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces complex electronic counting systems with a purely mechanical solution. The elastic radial double cam mechanism uses mechanical principles (elastic deformation, cam geometry, friction) to achieve accurate counting, eliminating the need for batteries, motors, or electronic displays while maintaining precision.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If a magnetic attachment system is used, then ease of operation is improved, but device complexity increases

Engineering Contradiction:
Improveease of attachmentVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The counter is divided into separate functional modules: a magnetic attachment system, a rotational number disk, and a ticker mechanism. This segmentation allows the magnetic component to be independently optimized for easy attachment while the other components handle counting functions, reducing overall system complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The magnetic attachment system serves multiple functions: it provides easy mounting on metal surfaces, acts as a structural support, and enables portable placement during workouts. This multi-functionality reduces the need for additional components, simplifying the overall device while improving ease of operation.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Reliability

If a radial elastic double cam mechanism is used, then reliability is improved, but manufacturing precision requirements increase

Engineering Contradiction:
ImprovereliabilityVSAvoidmanufacturing precision
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The patent uses elastic material properties (flexibility, deformation characteristics) as key parameters to achieve reliable operation. By selecting materials and geometric parameters appropriately, the mechanism achieves self-regulating rotation control without requiring extremely tight manufacturing tolerances on all components.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The elastic component provides built-in cushioning and compliance in the mechanism, absorbing variations in manufacturing precision and wear over time. This beforehand cushioning ensures reliable operation even with moderate manufacturing tolerances by compensating for dimensional variations through elastic deformation.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

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

Provides accurate and convenient counting of exercise sets, preventing miscounting and allowing users to easily track their progress without manual intervention.

Implementation Method 1

The magnetic rotational set counter may be magnetically attached to a metal surface of a piece of exercise equipment

Methodology Applied
Scientific EffectMagnetic attraction: Magnetism

Implementation Method 2

a radial elastic double cam mechanism that reduces the chance for miscounting

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS12566938B1Rotational magnetic set counter with an elastic radial double cam mechanism
Publication Date: 2026.03.03 BEVEL EDGE PLLC
  • US12566938B1 patent drawing
  • US12566938B1 patent drawing
  • US12566938B1 patent drawing

AI summary

A magnetic rotational set counter. The magnetic rotational set counter includes a front plate connected to a back plate. In between the front plate and the back plate, there is a number disk having a magnet inserted in a central cavity of the number disk. A ticker is included which has an elongated arm and an end piece. A display window is integrated into a front of the front plate. The number disk has an array of chronologically ordered numbers. A single number is shown from the display window of the front plate when the user turns the bottom portion of the number disk, which protrudes from an access window between the front plate and the back plate. The number disk is configured to rotate in a single direction in a forward direction. The ticker and number disk are configured to prevent miscounting.