Motorized Weight Selection Shaft for Uninterrupted Training

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Solution Overview

Problem

Conventional weight training exercises with free weight devices, such as dumbbells and kettlebells, often require manual adjustment of weights, disrupting the training activity and causing pauses.

Innovation Solution

An exercise device with a shell assembly and base assembly that includes a shaft for rotation, allowing for automatic selection and coupling of weights through a driver mechanism, enabling seamless weight adjustment during exercises.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If manual adjustment of weights is used in free weight devices, then weight selection is possible, but training activity is disrupted causing pauses

Engineering Contradiction:

Improveweight selectionVSAvoidtraining pause

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The desired weight is selected in advance through a digital interface before the exercise set begins. The motorized mechanism then automatically adjusts the weight by rotating the shaft to engage or disengage weight plates during the warm-up or between sets, eliminating the need to manually stop and adjust weights during active training.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The manual mechanical system of physically adding or removing weight plates is replaced with an automated motorized system. The motor rotates the shaft to selectively engage weight plates with the shell assembly, allowing weight adjustment without manual intervention and maintaining training continuity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If automatic weight adjustment mechanism is added, then weight selection efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveweight adjustment efficiencyVSAvoiddevice structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The shaft serves multiple functions: it is both the rotational element for weight selection and the engagement mechanism for coupling weight plates to the shell assembly. The motorized driver integrates the drive mechanism and the selection interface into a single integrated system, reducing the number of separate components needed.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The weight plates are nested around the shaft, with each plate having a recess that can engage with the shaft at different rotational positions. The shell assembly contains the shaft and weights within its interior space, creating a compact nested structure that minimizes the overall device footprint while maintaining automated functionality.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS10786700B2Exercise devices, systems, and methods

Publication Date: 2020.09.29 JAXAMO UK LTD

AI summary

Exercise devices, systems, and methods are disclosed. One exercise device includes weights, a shell assembly, and a base assembly. The shell assembly has a shell defining an interior sized to receive the weights. The shell assembly also has a shaft coupled for rotation relative to the shell. When the weights are received within the interior of the shell, rotation of the shaft relative to the shell selectively couples the shaft with one or more weights. The base assembly has a base configured to support the weights. The base assembly also has a driver configured to be coupled to the shaft when the shell assembly is supported by the base. The driver of the base assembly is configured to rotate the shaft relative to the shell when the driver is coupled to the shaft to selectively couple the shaft with the one or more weights.