Reverse-rotation Preventer for Inflatable Rotating Exhibit

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Solution Overview

Problem

Conventional inflatable rotating exhibits with synchronous motors often reverse direction due to temporary resistance, leading to unpredictable rotation.

Innovation Solution

A driver with a reverse-rotation preventer is integrated, featuring a synchronous motor, a reverse-rotation preventer, and a rotating assembly that applies resistance to correct the motor's direction when temporary resistance is encountered, ensuring consistent rotation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If a conventional synchronous motor is used to rotate the inflatable body, then the motor can provide sufficient rotating force, but the motor will reverse direction when excessive resistance is applied, causing unpredictable rotation

Engineering Contradiction:

Improverotating forceVSAvoidrotation direction stability

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

A reverse-rotation preventer mechanism is introduced as an intermediary component between the synchronous motor and the inflatable body. This mechanism includes a pawl and ratchet wheel that allow rotation in the forward direction but block reverse rotation, ensuring the inflatable body rotates only in the desired direction even when resistance is encountered

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The driving system is segmented into two functional parts: the synchronous motor provides rotating force, while the reverse-rotation preventer controls rotation direction. This segmentation allows each component to specialize in its function, with the motor focusing on power delivery and the preventer focusing on directional control

Inventive Principle:

Principle #1Segmentation

2Device complexity

If no reverse-rotation preventer is mounted, then the device structure remains simple, but the rotating body rotates in unpredictable direction when resistance is applied

Engineering Contradiction:

Improvestructure simplicityVSAvoidrotation direction control

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The resistance characteristic is changed by introducing the reverse-rotation preventer, which provides low resistance in the forward rotation direction but high resistance (blocking force) in the reverse direction. This parameter change ensures unidirectional rotation while maintaining operational simplicity

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS7710062B2Driver with a reverse-rotation preventer for an inflatable rotating exhibit

Publication Date: 2010.05.04 GEMMY IND CORP

AI summary

A driver with a reverse-rotation preventer for an inflatable rotating exhibit is mounted inside an inflatable rotating exhibit having a transparent inflatable body and a rotating body and has a rotating assembly and a reverse-rotation preventer. The rotating assembly connects to and rotates the rotating body and has a synchronous motor that rotates in a direction and has a shaft. The shaft is driven by the synchronous motor and rotates the rotating body. However, the synchronous motor will reverse its rotation when the rotating body encounters even temporary resistance while rotating. The reverse-rotation preventer applies a resistance when the rotating body rotates in the wrong direction to make the synchronous motor reverse rotation. Consequently, the reverse-rotation preventer ensures that the rotating inflatable exhibit rotates in the desired direction.