Power Tool Light Guide Plate Ring Illumination
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Solution Overview
Problem
Current power tools with complex light source devices at their ends result in a longer radial dimension, obstructing the user's line of sight when operating in narrow spaces, causing operational inconvenience.
Innovation Solution
A power tool design incorporating a light source device with a light guide plate, light-emitting elements, and a circuit board, where the light guide plate has a light exit surface and two light incident surfaces, and a reflective surface to illuminate the working portion, with the light incident surfaces positioned close enough to provide a nearly complete ring of light, enhancing visibility without increasing the tool's radial length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source device with a complicated structure is provided at an end of the power tool, then the lighting effect is improved, but the radial length of the power tool increases, causing the user's line of sight to be blocked
Solution Approach 1:
The patent transitions from a conventional linear light source arrangement to a ring-shaped light guide plate configuration. By arranging light-emitting elements in a circular pattern around the power output member and using a ring-shaped light guide plate with light incident surfaces positioned at specific radial distances, the design achieves comprehensive illumination of the working portion while maintaining a compact radial profile that does not obstruct the user's line of sight.
2Area of stationary object
If the light incident surfaces are positioned closer to provide a nearly complete ring of light, then the field of view is widened, but the structural complexity increases
Solution Approach 1:
The light guide plate is segmented into multiple light incident surfaces arranged circumferentially around the power output member. Each light incident surface receives light from independent light-emitting elements, and the segmented structure allows light to be distributed uniformly around the working portion, creating a nearly complete ring of light that widens the user's field of view while maintaining manufacturing feasibility through modular assembly.
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 improves visibility in dim environments by providing a wider field of view and convenience for the user while maintaining a compact tool structure, reducing the radial length and enhancing the lighting effect at the working portion.
Implementation Method 1
The light source device includes a light guide plate, a circuit board, and a light-emitting element. The light-emitting element is installed on the circuit board and configured to emit the light toward the light incident surface
Implementation Method 2
The light guide plate is formed with a light exit surface for emitting light and a light incident surface for guiding light into the light guide plate
Implementation Method 3
The reflective surface is disposed on the power tool and reflects light emitted by the light source device toward the working portion
Data Source
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AI summary
Provided is a power tool. The power tool includes a housing, a motor, a power output member, a transmission assembly, and a gearbox. The motor is disposed in the housing. The power output member is configured to output power, extends substantially along an axis, and is connected to an operating accessory, the operating accessory is provided with a working portion, and the axis extends substantially along a front-and-rear direction. The transmission assembly is configured to transmit power of the motor to the power output member. The gearbox is configured to accommodate the transmission assembly. The power tool further includes a light source device disposed in the housing to illuminate the working portion of the power tool. The light source device includes a light guide plate, a light-emitting element, and a circuit board. The light guide plate is formed with a light exit surface for emitting light and a first light incident surface and a second light incident surface for guiding light into the light guide plate. The light-emitting element emits the light toward the light incident surface. The circuit board is used for installing the light-emitting element. A maximum distance L between the first light incident surface and the second light incident surface along a left-and-right direction is greater than or equal to 0 mm and less than or equal to 7 mm. The power tool has a good lighting effect.