Power Supply Layout That Blocks Battery and Cable Co-Use

Solution Overview

Problem

Conventional electronic devices require a circuit configuration to prevent backflow of current when using both primary batteries and external power sources, increasing manufacturing costs and complexity.

Innovation Solution

Designing an electronic device with a physical structure that prevents simultaneous use of batteries and external power sources by overlapping battery and cable storage areas, eliminating the need for backflow protection elements and allowing safe operation without them.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If backflow protection elements are added to prevent current backflow when using both batteries and external power sources, then safety is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

ImprovesafetyVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and removes the backflow protection elements from the device by designing a physical structure that prevents simultaneous use of batteries and external power sources. The overlapping storage areas ensure that only one power source can be connected at a time, eliminating the need for complex electrical protection circuits while maintaining safety.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces the electrical protection system (backflow protection elements) with a mechanical prevention system (overlapping storage areas that physically prevent simultaneous connection). This mechanical approach is simpler and more reliable than electrical protection circuits.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If backflow protection elements are added to prevent current backflow, then safety is improved, but manufacturing cost increases

Engineering Contradiction:

ImprovesafetyVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention extracts and removes the backflow protection elements from the device by designing a physical structure that prevents simultaneous use of batteries and external power sources. The overlapping storage areas ensure that only one power source can be connected at a time, eliminating the need for complex electrical protection circuits while maintaining safety.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If backflow protection elements are added to prevent current backflow, then safety is improved, but device size increases

Engineering Contradiction:

ImprovesafetyVSAvoiddevice size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The invention replaces the electrical protection system (backflow protection elements) with a mechanical prevention system (overlapping storage areas that physically prevent simultaneous connection). This mechanical approach is simpler and more reliable than electrical protection circuits.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11812573B2Electronic device capable of avoiding simultaneous use of power supplies having different terminal structures from each other

Publication Date: 2023.11.07 FCL COMPONENTS LTD

AI summary

A touch panel device includes a first conductive film having first and second regions, at least a part of the first conductive film between the first and the second regions being removed, a second conductive film laminated on the first conductive film across a gap, first and second terminals that output signals, a first electrode electrically connected to the first terminal, a second electrode facing the first electrode across the first region, a first resistor provided on the first conductive film in the second region and having a pair of electrodes, the pair of electrodes facing each other across a first resistance region in the first conductive film, one of the electrodes being electrically connected to the second electrode, the other of the electrodes being electrically connected to the second terminal, and a first switch electrically connecting the first conductive film to the second conductive film, in the second region.