Nested Counterweight for Rotatable Performance Device

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Solution Overview

Problem

Existing yo-yo counterweights are not easily configurable between single and double configurations, making it uncomfortable for users to perform tricks and difficult for those with smaller hands to control the device.

Innovation Solution

A nested counterweight system comprising an outer housing and an inner slider, allowing quick transitions between nested and separated configurations, enabling seamless maneuver changes by sliding the inner slider along the string.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If two solid bodies are added to the string as counterweights, then more maneuvers are possible, but gripping two solid bodies becomes uncomfortable and difficult for users with smaller hands

Engineering Contradiction:

Improvemaneuver varietyVSAvoidhand comfort

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The inner counterweight is nested within the outer counterweight housing, allowing both counterweights to occupy the same spatial envelope. When nested, they form a compact single-unit configuration that fits comfortably in the user's hand. When separated, they provide two distinct gripping points for advanced maneuvers.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The inner counterweight is made movable along the string rather than fixed, allowing it to transition between nested and separated positions. This dynamic configuration enables the user to switch between compact single-counterweight mode and extended dual-counterweight mode as needed for different maneuvers.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If two solid bodies are added to the string as counterweights, then more maneuvers are possible, but transitions between configurations become complex and time-consuming

Engineering Contradiction:

Improvemaneuver varietyVSAvoidconfiguration transition time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The inner counterweight is designed to slide freely along the string within the outer housing, allowing rapid transition between nested and separated configurations without requiring complex assembly or disassembly operations.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The counterweight system is divided into independent inner and outer counterweight components that can move relative to each other, enabling quick reconfiguration between single and dual counterweight modes.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If two solid bodies are added to the string as counterweights, then more maneuvers are possible, but the device becomes too large for users with smaller hands

Engineering Contradiction:

Improvemaneuver varietyVSAvoidcounterweight size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The inner counterweight is nested within the outer counterweight housing, allowing both counterweights to occupy the same spatial envelope. This nested arrangement maintains a compact overall volume that fits comfortably in smaller hands while still providing dual counterweight functionality when separated.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS10722808B2Nested counterweight for a rotatable performance device

Publication Date: 2020.07.28 DUNCAN TOYS CO LLC

AI summary

A nested counterweight for a rotatable performance device includes an outer housing and an inner slider. The outer housing defines an interior volume and is configured to be positioned along a string of the rotatable performance device. The inner slider is also configured to be positioned along the string of the rotatable performance device. The inner slider is positioned within the interior volume on the outer housing in a nested configuration. The inner slider is positioned along the string away from the outer housing in a separated configuration.