Ring-Shaped Light Guide for Electric Working Machine Illumination
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Solution Overview
Problem
Conventional electric working machines with LEDs are limited in their ability to illuminate areas beyond the working point, which restricts their workability and usability.
Innovation Solution
Incorporating a ring-shaped light guide that extends along the outer circumference of the housing, which receives light from a light emitter and radiates it to surrounding areas, combined with a reflector to enhance light distribution and a detachable illuminator attachment for improved illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single LED is used to illuminate the working point, then the working point can be locally illuminated, but the surrounding area cannot be illuminated
Solution Approach 1:
A light guide is introduced as an intermediary component between the LED light source and the surrounding area. The light guide receives light from the LED and radiates it along its outer circumference, enabling indirect illumination of the surrounding workspace without requiring multiple LEDs.
Solution Approach 2:
The light guide is configured in a ring shape that extends along the outer circumference of the housing, transforming the illumination from a point source to a distributed linear source. This dimensional transformation allows light to be radiated along the circumferential direction, covering a wider area.
2Illumination intensity
If multiple LEDs are used to illuminate both the working point and surrounding area, then illumination coverage is improved, but device complexity and size increase
Solution Approach 1:
The light guide serves multiple functions: it acts as a structural component extending along the housing circumference, serves as a light transmission medium, and functions as a light radiation surface. This multi-functionality eliminates the need for additional illumination components, maintaining compact device size.
Solution Approach 2:
The illumination function is merged with the existing housing structure by configuring the light guide to extend along the outer circumference of the housing. This integration allows the housing to contribute to illumination without requiring separate illumination components.
3Illumination intensity
If light is radiated in all directions from the light guide, then illumination coverage is maximized, but light quantity in specific directions is insufficient
Solution Approach 1:
A reflector is introduced to create asymmetric light distribution. The reflector is positioned to reflect light radiated in a first direction toward a second direction, concentrating light quantity in the second direction where it is most needed for workspace illumination.
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 enables wider and more effective illumination of the surrounding area, enhancing the workability of the electric working machine by providing brighter and more extensive lighting, while also reducing manufacturing complexity and size through integrated components.
Implementation Method 1
While propagating the light entered the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide
Implementation Method 2
The reflector reflects the light radiated in a first direction from the light guide toward a second direction opposite the first direction
Data Source
AI summary
An electric working machine according to one aspect of the present disclosure includes a motor, a driving mechanism, a housing, a grip, a first light emitter, and a light guide. The first light emitter emits light. The light guide has a ring-shape. The light guide is extending along an outer circumference of the housing. The light guide includes a light entering surface receiving the light emitted from the first light emitter. While propagating the light entered from the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide.