Electric Work Machine Optical Member for Operator Glare Reduction
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Solution Overview
Problem
Existing electric work machines with COB LEDs cause glare to operators, reducing the visibility of the workpiece due to direct light exposure.
Innovation Solution
An electric work machine design featuring a light emitter surrounded by an optical member with an outer cylinder and a light transmitter, combined with a light shield located radially outward from the outer cylinder, to redirect and shield light away from the operator's eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If COB LEDs are used for lighting, then lighting luminance is improved, but operator visibility is worsened due to glare
Solution Approach 1:
A diffusing member is introduced as an intermediary between the COB LED light emitter and the operator's eyes. This diffusing member scatters the direct light rays, converting the harmful concentrated beam into dispersed light that illuminates the workpiece without creating glare in the operator's field of view.
Solution Approach 2:
The harmful direct light component is extracted or removed from the light path by using the diffusing member to separate the useful illumination function from the harmful glare effect, allowing the lighting to maintain high luminance while eliminating the adverse visual impact on the operator.
2Object-affected harmful factors
If light shield is added to reduce glare, then operator visibility is improved, but device complexity increases
Solution Approach 1:
The diffusing member is integrated into the existing optical member structure, merging the glare-reduction function with the existing lighting components. This combination approach achieves glare protection without requiring a completely separate and complex light shielding system, thus minimizing the increase in device complexity.
Solution Approach 2:
The optical member is designed to serve multiple functions: it provides structural support for the LED, directs light toward the workpiece, and incorporates the diffusing member to reduce glare. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving glare reduction.
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
This configuration reduces glare to the operator, maintaining the visibility of the workpiece by effectively redirecting light emitted from the COB LEDs.
Implementation Method 1
a light transmitter located frontward from the light emitter, the light transmitter being configured to allow light emitted from the light emitter to pass through
Implementation Method 2
an optical member including an outer cylinder located radially outward from the light emitter... a light shield located radially outward from the outer cylinder
Data Source
AI summary
An electric work machine avoids lowering the visibility of a workpiece by an operator. An electric work machine includes a motor, an output unit operable with a rotational force from the motor, a light emitter at least partially surrounding the output unit, an optical member including an outer cylinder located radially outward from the light emitter, and a light transmitter located frontward from the light emitter to allow light emitted from the light emitter to pass through, and a light shield located radially outward from the outer cylinder.