Interactive Door Knob Assembly with Rotation Sensing

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Solution Overview

Problem

Traditional door knobs lack interactive features that provide educational, entertaining, and decorative value, especially for children and elderly individuals, and do not effectively respond to variations in rotation direction and speed.

Innovation Solution

A door knob assembly equipped with a spindle, accelerometer, and electronic components that sense the rate and direction of rotation, activating pre-recorded messages and visual responses through LEDs and speakers, allowing for customizable interactions and safety features.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional door knob design is used, then manufacturing simplicity is maintained, but interactive and educational functionality is lost

Engineering Contradiction:

Improveinteractive functionalityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into a single door knob assembly: mechanical door operation, rotation sensing via accelerometer, audio output through speaker, visual output through LED, and electronic control. This merging allows the door knob to provide interactive educational content while maintaining its primary function of opening doors, thereby improving adaptability without proportionally increasing complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The door knob assembly serves multiple purposes: it operates as a traditional door mechanism, detects rotation direction and speed, plays pre-recorded educational messages, displays visual indicators, and provides safety monitoring. This multi-functionality directly addresses the contradiction by making the device versatile while managing complexity through integrated design.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If rotation sensing components are added, then detection precision is improved, but device complexity increases

Engineering Contradiction:

Improverotation detection precisionVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical rotation detection mechanisms with an accelerometer-based electronic sensing system. The accelerometer detects changes in orientation and motion to determine rotation direction and speed, providing precise measurement without requiring complex mechanical encoders or switches, thereby improving detection precision while managing complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If electronic components are integrated, then educational and entertainment value is enhanced, but ease of manufacture decreases

Engineering Contradiction:

Improveeducational valueVSAvoidease of manufacture

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The electronic components (accelerometer, speaker, LED, control circuitry) are segmented into separate modular units within the door knob assembly. This segmentation allows each component to be manufactured and tested independently, then assembled together, making the overall manufacturing process more manageable despite the increased functionality.

Inventive Principle:

Principle #1Segmentation

4Loss of information

If pre-recorded messages are activated, then information delivery is improved, but energy consumption increases

Engineering Contradiction:

Improveinformation deliveryVSAvoidenergy consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The pre-recorded messages are played periodically based on detected rotation events rather than continuously. The system activates the speaker only when rotation is detected, playing appropriate messages at those moments, which provides effective information delivery while minimizing energy consumption by keeping the audio system dormant during non-interactive periods.

Inventive Principle:

Principle #19Periodic action

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

Enhances household safety and entertainment by providing interactive responses based on knob rotation, promoting educational and decorative value while maintaining functional door operation.

Implementation Method 1

knob rotation sensing components comprised of an accelerometer

Methodology Applied

Scientific EffectAccelerometer: Accelerometer

Implementation Method 2

at least one said knob is equipped with Light Emitting Diodes (LEDs)

Methodology Applied

Scientific EffectLight Emitting Diode: Light Emitting Diode

Data Source

PatentUS11261618B1Interactive door knob

Publication Date: 2022.03.01 WALLACE EDMOND

AI summary

A door knob assembly that provides an interactive visual and aural assembly familiar to a room occupant and that responds to variations in the manner of rotation of the knob in a plurality of responses, depending on the direction and rate of rotation applied to the knob, providing messages appropriate to the entertainment, safety and/or training of the knob operator and/or room occupant.