LED Mounting in Clamshell Housing via Molded Fingers
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Solution Overview
Problem
The existing methods for securing LEDs in motorized hand tools, such as clamshell housing geometries, increase manufacturing costs due to the need for additional parts and assembly steps, particularly the use of snap fit components and fasteners.
Innovation Solution
The clamshell housing geometry is modified to include molded fingers that define channels for receiving LED conductors, which are then encapsulated in a rigid sleeve for a friction fit, eliminating the need for snap fit components and additional fasteners by using a switch assembly to cover and secure the conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional LED mounting methods using separate components and fasteners are used, then the LED is securely mounted, but the parts count and manufacturing cost increase
Solution Approach 1:
The LED mounting structure is merged with the clamshell housing itself. The housing includes molded-in fingers that define channels to receive and secure the LED and its conductors, eliminating the need for separate mounting components, snap-fit inserts, or additional fasteners. This integration maintains secure LED mounting while significantly reducing parts count.
Solution Approach 2:
The clamshell housing performs multiple functions: it encloses the tool components, provides structural support, and simultaneously serves as the LED mounting structure through its molded-in fingers and channels. This multi-functionality eliminates the need for dedicated LED mounting components, reducing overall device complexity.
2Reliability
If traditional LED mounting methods with multiple assembly steps are used, then the LED is securely located, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The LED mounting features (fingers and channels) are pre-formed as integral parts of the clamshell housing during the housing molding process. This preliminary action eliminates the need for subsequent assembly steps to install separate mounting components, simplifying the manufacturing process while ensuring precise LED positioning through the pre-configured channels.
Solution Approach 2:
The LED mounting structure is combined with the housing manufacturing process itself. The molded-in fingers and channels are created during housing production, eliminating the need for separate assembly operations to install mounting components, thereby reducing manufacturing steps and complexity.
3Reliability
If additional fasteners and adhesives are used to secure the LED, then the LED is firmly attached, but the manufacturing cost increases
Solution Approach 1:
The attachment function is merged into the housing structure itself. The molded-in fingers provide mechanical engagement features that secure the LED and conductors through the channel geometry, eliminating the need for separate fasteners or adhesives while maintaining firm attachment.
Solution Approach 2:
The housing structure provides its own LED mounting and securing function through the molded-in fingers and channels. The geometry of these features creates friction fit and mechanical engagement that secures the LED without requiring external fastening components or chemical adhesives.
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 approach reduces the parts count and manufacturing steps, thereby lowering the cost of motorized hand tools while ensuring secure and protected LED placement within the clamshell housing.
Implementation Method 1
The conductors may be overmolded or enclosed in a shrink wrap material to provide a rigid sleeve around the each of conductors. Each conductor is mounted in a channel defined by fingers extending into the clamshell housing by friction fit between the rigid sleeve and the fingers.
Data Source
AI summary
A motorized hand tool, such as a cordless ratchet wrench, is configured for reducing part count and reducing assembly processes. The motorized hand tool includes an overmolded window for a light emitting diode (LED) in a clamshell housing. An LED is secured within the clamshell housing by conductors extending from the LED that are encapsulated in rigid sleeves. The rigid sleeves provide a friction fit in a channel between fingers molded in the clamshell housing. A switch assembly of the motorized hand tool is mounted in the clamshell housing and covers channel to contains the conductors and sleeves. By containment of the rigid sleeves and conductors, the LED is located securely in the overmolded window.