Rotating Play Device Speed Limiting Mechanism

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Solution Overview

Problem

Rotating play devices, such as merry-go-rounds, can rotate children at hazardous speeds, potentially throwing them off due to centripetal force, as they lack effective speed control and containment mechanisms.

Innovation Solution

Inclusive rotating play devices are designed with a stationary base, a rotatable portion, and a speed limiting device that connects the two, featuring a cranking or piston mechanism to control rotational speed and a sitting structure with an elevated outer perimeter and recessed areas to contain children, ensuring safety by limiting the rotational speed and maintaining children within the device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If rotating play devices allow free rotation without speed control, then children can spin freely for entertainment, but the rotational speed becomes hazardous and may throw children off

Engineering Contradiction:

Improvefree rotation capabilityVSAvoidhazardous rotational speed

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by implementing a speed limiting device that controls the rotational speed parameter of the merry-go-round. The device transitions the system from uncontrolled high-speed rotation to controlled safe-speed rotation, directly addressing the hazardous speed issue while preserving the rotational entertainment function

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The speed limiting device acts as an intermediary mechanism between the children's input force and the rotational motion. It mediates the energy transfer by allowing rotation to occur but limiting the maximum speed achieved, thus preventing hazardous conditions while maintaining the play function

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If traditional merry-go-rounds lack containment mechanisms, then the structure remains simple, but children can be thrown off due to centripetal force

Engineering Contradiction:

Improvestructural simplicityVSAvoidchild containment safety

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies segmentation by dividing the containment function into separate structural elements: an elevated outer perimeter wall and recessed portions. This segmentation provides containment safety through multiple discrete features rather than a single complex mechanism, maintaining relative structural simplicity while improving reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The elevated outer perimeter and recessed portions create preliminary anti-action by forming physical barriers that prevent children from being thrown off before the hazardous event can occur. The structure proactively counteracts the centripetal force effects that would otherwise eject children from the rotating device

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS9220988B2Inclusive rotating play device

Publication Date: 2015.12.29 LANDSCAPE STRUCTURES INC

AI summary

Rotating inclusive play devices are provided. In certain embodiments, a rotating play device includes a stationary base, a rotatable portion, and a speed limiting device that connects the stationary base to the rotatable portion. The speed limiting device illustratively limits a rotational speed of the rotatable portion relative to the stationary base. The rotatable portion may have an elevated outer perimeter that includes recessed and raised portions. The speed limiting device may include a cranking mechanism and/or a piston mechanism.