Transformer-Powered Doorbell Control Device

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Solution Overview

Problem

Conventional doorbell systems face issues with reliability, cost, and installation complexity due to the need for batteries and additional power circuits, which occupy space and increase costs, and can result in buzzing sounds when not pressed and interrupted video recording.

Innovation Solution

A doorbell system with a control device that uses a transformer to power both the doorbell control device and interface device continuously with AC voltage, eliminating the need for batteries and incorporating a built-in speaker unit controlled by current or voltage changes to prevent buzzing and enable uninterrupted video recording.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If batteries and additional power circuits are used to power the doorbell system, then the system can operate continuously, but the device complexity and installation complexity increase

Engineering Contradiction:

Improvecontinuous operationVSAvoidpower circuits

Core Design Contradiction:

Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

The patent extracts and eliminates the battery component from the doorbell system, replacing it with a transformer-based AC power supply. This removes the need for battery compartments, charging circuits, and power management components, thereby reducing device complexity while maintaining continuous operation capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The transformer serves multiple functions: it provides power to both the doorbell control device and the doorbell interface device, eliminating the need for separate power sources. This multi-functional approach reduces the overall number of power circuits required in the system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If batteries are used to power the doorbell system, then the system can operate portably, but the production cost and installation cost increase

Engineering Contradiction:

ImproveportabilityVSAvoidproduction cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent replaces expensive, maintenance-intensive batteries with a low-cost transformer-based AC power supply. The transformer is a simple, inexpensive component that provides continuous power without replacement, significantly reducing production costs while maintaining system portability through wireless communication capabilities.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-generated harmful factors

If conventional power circuits are used, then the doorbell can produce sound, but unwanted buzzing sounds occur when not pressed

Engineering Contradiction:

Improvebuzzing soundsVSAvoidsound control

Core Design Contradiction:

Object-generated harmful factorsVSReliability

Solution Approach 1:

The control unit continuously monitors the state of the doorbell interface device and adjusts the speaker unit's operation accordingly. When the interface device is not pressed, the control unit detects this state and prevents the speaker unit from producing sound, eliminating unwanted buzzing. When pressed, it activates the speaker unit to produce the doorbell sound.

Inventive Principle:

Principle #23Feedback

4Duration of action of stationary object

If batteries are used for power supply, then the doorbell system can function independently, but video recording may be interrupted due to battery maintenance

Engineering Contradiction:

Improvevideo recording continuityVSAvoidpower supply stability

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The transformer-based AC power supply provides continuous, uninterrupted power to the doorbell system, eliminating battery replacement cycles that would interrupt video recording. The system maintains constant power delivery, ensuring uninterrupted operation of video recording and streaming functions.

Inventive Principle:

Principle #20Continuity of useful 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

The solution reduces production costs, enhances system reliability, and allows for long-time high-quality video streaming without battery maintenance, simplifying installation and preventing unwanted sounds when the doorbell is not pressed.

Implementation Method 1

The transformer outputs an AC voltage to the first pin and the third pin of the doorbell control device

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The rectifier is coupled to the first pin and the third pin, and is configured to generate a first DC voltage

Methodology Applied

Scientific EffectRectification: Diode

Data Source

PatentUS9786134B2Doorbell system and doorbell control device

Publication Date: 2017.10.10 SERCOMM CORP

AI summary

A doorbell system and a doorbell control device are provided. The doorbell system includes a doorbell control device, a transformer, and a doorbell interface device. The doorbell control device has a first pin, a second pin, and a third pin. The doorbell control device includes a speaker unit and a control unit. The control unit is configured to control whether or not the speaker unit produces sound according to a current or a voltage of the second pin. The first pin is coupled to the second pin. The transformer outputs an AC voltage to the first pin and the third pin of the doorbell control device. The doorbell interface device is coupled to the second pin and the third pin of the doorbell control device.