Magnetic Weight Guide for Friction-Free Gym Machines

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Solution Overview

Problem

Existing gymnastic exercise machines suffer from friction and wear issues due to the sliding of weights along lubricated bushings, necessitating frequent maintenance for lubrication and cleaning.

Innovation Solution

The machine employs magnetic skids that generate a magnetic field to guide the sliding of weights along ferromagnetic guides without surface contact, eliminating friction and wear.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If lubricated bushings are used for sliding weights along guides, then the weights can slide along the guides, but friction and wear occur over time requiring continuous maintenance

Engineering Contradiction:

Improvesliding operationVSAvoidmaintenance frequency

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent replaces the mechanical sliding system (weights sliding directly on guides with bushings) with a magnetic guidance system. Magnetic skids attached to the weights interact with ferromagnetic guides through magnetic fields, eliminating direct mechanical contact and the associated friction and wear that require maintenance.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic skids as an intermediary element between the weights and the guides. These skids carry magnetic elements that generate magnetic fields to guide the weights along the ferromagnetic guides without direct contact, thereby eliminating the need for lubrication and reducing maintenance requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If lubricated bushings are used for sliding weights, then weights can move along guides, but friction increases over time due to wear and degradation

Engineering Contradiction:

Improveweight slidingVSAvoidfriction

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical contact-based sliding system with a magnetic field-based guidance system. The magnetic skids generate magnetic fields that interact with the ferromagnetic guides, allowing weights to slide along the guides without direct mechanical contact, thereby eliminating friction caused by wear and degradation of contact materials.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental interaction parameter from mechanical contact to magnetic field interaction. By using magnetic fields instead of physical contact, the system eliminates the harmful friction effect that increases over time due to wear, while maintaining the ability to guide weights smoothly along the guides.

Inventive Principle:

Principle #35Parameter changes

3Ease of repair

If magnetic skids are used to guide weights without surface contact, then friction and wear are eliminated, but device complexity increases

Engineering Contradiction:

Improvemaintenance requirementsVSAvoidmagnetic guidance system

Core Design Contradiction:

Ease of repairVSDevice complexity

Solution Approach 1:

The magnetic skids serve multiple functions: they provide structural support for the magnetic elements, guide the weights along the guides through magnetic fields, and eliminate the need for separate lubrication and maintenance systems. This multi-functionality justifies the added complexity by eliminating other system components and maintenance requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This solution results in silent, maintenance-free operation by centrally aligning weight movement along guides, reducing friction and wear, and minimizing the need for regular maintenance.

Implementation Method 1

one or more magnetic skids (15) which are disposed on and are jointly movable with the at least one weight (4) and are configured to generate along the at least one guide (2, 3) at least a magnetic field configured to guide the sliding of said at least one weight (4) along and without surface contact with said at least one guide (2, 3)

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

at least a guide (2, 3) made of ferromagnetic material

Methodology Applied

Scientific EffectFerromagnetism: Ferromagnetism

Data Source

PatentEP4696384A1Machine for gymnastic exercises

Publication Date: 2026.02.18 TECHNOGYM SPA

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AI summary

Machine (1) for gymnastic exercises, comprising: - at least one guide (2, 3) made of ferromagnetic material; - at least one weight (4) suitable for being slid, during execution of an exercise by a user, along said at least one guide (2, 3); characterized in that it comprises one or more magnetic skids (15) that are arranged on and are movable jointly with said at least one weight (4), said one or more magnetic skids (15) being configured to generate along said at least one guide (2, 3) at least one magnetic field configured to guide the sliding of said at least one weight (4) along and without surface contact with said at least one guide (2, 3).