Elongated Light Emitting Device for Hand-Held Power Tool Housing
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Solution Overview
Problem
Existing hand-held power tools lack an effective and visually appealing way to communicate their operational status, with current LED systems being small, difficult to see, and not integrated into the tool's design, while external light guides are prone to damage and inefficiency.
Innovation Solution
The integration of an elongated light emitting device within a transparent holding arrangement on the tool housing, which is easily attachable and protects the light source, providing a wide illuminated surface and enhancing the tool's design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If small LEDs are used as control lights in the tool housing, then the cost is reduced and the device is simple, but the visibility and design appeal are poor
Solution Approach 1:
The patent transitions from point-source LEDs to an elongated linear light emitting device that extends along the tool housing. This dimensional change from 0D point lights to 1D linear lights dramatically increases the visible light area and improves design integration while maintaining reasonable system complexity
Solution Approach 2:
The elongated light emitting device can be divided into multiple independent LED segments or zones along its length, allowing different sections to display different colors or patterns for various operational statuses, thereby enhancing visibility and information conveyance without proportionally increasing overall system complexity
2Area of stationary object
If an external light guide is attached to the tool housing, then the light emission area is increased, but the light guide is exposed to damage and environmental influences
Solution Approach 1:
The light emitting device is nested within a recess or groove formed in the tool housing structure. This nesting approach allows the light emitting device to be partially or fully enclosed by the housing, providing mechanical protection and environmental sealing while maintaining an extended light emission area visible from the exterior
Solution Approach 2:
The light emitting device is integrated into the tool housing structure itself, merging the housing and light emitting components into a unified assembly. This integration provides inherent protection through the housing structure while achieving extended light emission areas through the elongated design
3Illumination intensity
If an elongated light emitting device is used, then the design appeal and visibility are improved, but the mounting and protection become more difficult
Solution Approach 1:
The tool housing is pre-formed with integrated recesses, grooves, or mounting structures during the housing manufacturing process. These preliminary structural features are designed to receive and secure the elongated light emitting device, making the subsequent assembly process simple and efficient while providing inherent protection
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 ensures the operational status is clearly visible and integrated into the tool's design, offering improved visibility and protection, while maintaining efficiency and ease of assembly.
Implementation Method 1
at least one elongated light emitting device (56) having a longitudinal extension (58) and located at least partially on an external surface of the tool housing (12), the light emitting devices emitting light along at least part of their longitudinal extensions
Data Source
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AI summary
The invention refers to a hand-held power tool (10), comprising a tool housing (12), a working element (30) protruding from the tool housing (12) and designed to perform a working movement (34) during an intended use of the power tool (10), a motor (28) located inside the tool housing (12) and designed to drive the working element (30) to perform the working movement (34) during the intended use of the power tool (10), and at least one elongated light emitting device (56) having a longitudinal extension (58) and located at least partially on an external surface of the tool housing (12), wherein the at least one elongated light emitting device (56) is designed to emit light along at least part of its longitudinal extension (58) in a direction (86; 96) that is essentially perpendicular to the longitudinal extension (58) of the elongated light emitting device (56). It is suggested that at least one elongated holding arrangement (200) made of a transparent material and adapted for receiving and surrounding at least part of the elongated light emitting device (56) and for being attached to the tool housing (12).