Dual-Light Flashlight Layout for Distance and Ambient Lighting

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Solution Overview

Problem

Flashlights are limited in their usage scenarios due to direct light sources, requiring additional lamps for tasks like reading or creating atmosphere, which is inefficient.

Innovation Solution

A multi-functional flashlight design with a main light source for long-distance illumination and a lateral light source for table or atmosphere lighting, along with a switch mechanism to toggle between these modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a direct light source is used for long-distance illumination, then illumination distance is improved, but lighting versatility deteriorates

Engineering Contradiction:
Improveillumination distanceVSAvoidlighting versatility
Core Design Contradiction:
Illumination intensityVSAdaptability or versatility

Solution Approach 1:

The flashlight is divided into two independent lighting systems: a main light source assembly for long-distance illumination and a lateral light source assembly for ambient lighting. Each assembly can operate independently or simultaneously, allowing the user to select the appropriate lighting mode for different scenarios.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The flashlight body is designed to perform multiple lighting functions through two light source assemblies. The main light source provides focused long-distance illumination, while the lateral light source provides diffuse ambient lighting for reading, writing, or atmosphere creation, making the device universally applicable to various lighting needs.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If additional lamps are used for reading or atmosphere lighting, then lighting versatility is improved, but device complexity deteriorates

Engineering Contradiction:
Improvelighting versatilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Two previously separate devices (flashlight and ambient lamp) are merged into a single integrated flashlight body. The main light source assembly and lateral light source assembly share the same power supply, control circuitry, and housing, reducing the number of devices needed while maintaining lighting versatility.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The flashlight body is designed as a universal lighting device that can perform multiple functions: long-distance illumination through the main light source and ambient lighting through the lateral light source. This multi-functionality eliminates the need for separate reading lamps or atmosphere lights.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If a lateral light source assembly is added to the flashlight body, then lighting versatility is improved, but structural complexity deteriorates

Engineering Contradiction:
Improvelighting versatilityVSAvoidstructural complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lateral light source assembly is positioned at the side of the flashlight body, utilizing the lateral dimension rather than extending the length. This spatial arrangement allows the second light source to provide ambient lighting without significantly increasing the overall length or complicating the structural design.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The lateral light source assembly is integrated within the flashlight body structure, with its light-emitting portion extending from the side surface. This nesting approach allows the additional lighting function to be incorporated without requiring a completely separate external device.

Inventive Principle:
Principle #7Nested doll (Nesting)

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

Enables a single flashlight to serve multiple lighting needs, enhancing usability and adaptability in various scenarios.

Implementation Method 1

a main light source being disposed on the main light source assembly, and being configured to emit light in a length direction of the flashlight body

Methodology Applied
Scientific EffectLight emission: Light Emitting Diode

Implementation Method 2

a lateral light source assembly mounted at the second mounting position, and configured to emit a ring-shaped light at an acute angle with the flashlight body from a side surface of the flashlight body

Methodology Applied
Scientific EffectLight emission: Light Emitting Diode

Implementation Method 3

the lateral light source assembly including a ring-shaped light source and a ring-shaped lens

Methodology Applied
Scientific EffectLight refraction: Refraction

Data Source

PatentUS12571522B2Multi-functional flashlight
Publication Date: 2026.03.10 SHENZHEN OBUY TECH CO LTD
  • US12571522B2 patent drawing
  • US12571522B2 patent drawing
  • US12571522B2 patent drawing

AI summary

A multi-functional flashlight includes: a flashlight body having a power supply and a switch assembly arranged therein; a head base connected to an end of the flashlight body, a first mounting position being formed at an end of the head base away from the flashlight body, a second mounting position being formed at an end of the head base close to the flashlight body; a main light source assembly mounted at the first mounting position, a main light source being disposed on the main light source assembly, and being configured to emit light in a length direction of the flashlight body; and a lateral light source assembly mounted at the second mounting position, and configured to emit a ring-shaped light at an acute angle with the flashlight body from a side surface of the flashlight body.