Downlight Assembly with Twist-Lock Trim and Snap-Fit Lens
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Solution Overview
Problem
The assembly process of downlight lighting assemblies in restricted spaces like ceilings is cumbersome and time-consuming, leading to potential assembly errors and increased costs, and there is a need for a universal attachment method for both round and square trim members.
Innovation Solution
The design incorporates a snap-fit engagement between the lens and mixing chamber, a twist and lock trim system with a frictional engagement mechanism, and a compressive force to secure the LED chip and heat sink, allowing for effortless assembly and disassembly, along with a universal attachment method for round and square trims using a slotted circular disk and bayonet feature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional assembly methods are used for downlight lighting assemblies, then the assembly process can accommodate various trim members, but the assembly process becomes cumbersome and time-consuming
Solution Approach 1:
The patent implements a universal mounting system where a single mounting structure with a circular opening and bayonet feature can accommodate both round and square trim members. The mounting structure includes a circular opening configured to receive a round trim member or a square trim member, eliminating the need for different mounting mechanisms for different trim types. This multi-functional design directly reduces assembly time while maintaining versatility.
Solution Approach 2:
The assembly is divided into distinct modular components: the downlight lighting assembly (with heat sink, LED module, and mixing chamber) and the separate trim member (round or square). The mounting structure serves as an interface between these segments, allowing the trim to be attached independently. This segmentation enables the main assembly to be pre-assembled and tested, then quickly paired with different trim types using the universal bayonet mounting mechanism.
2Adaptability or versatility
If multiple attachment methods are provided for different trim members, then versatility is improved, but device complexity increases
Solution Approach 1:
The mounting structure employs a single universal design that works with both round and square trims. The circular opening and bayonet feature create a standardized interface that accommodates different trim geometries without requiring different mounting mechanisms. The trim member itself is designed with corresponding features (circular opening for round trim, square opening for square trim) that interface with this universal mounting structure, eliminating the need for multiple specialized mounting systems.
Solution Approach 2:
The bayonet feature introduces an asymmetric locking mechanism into the otherwise circular symmetric mounting structure. The bayonet feature includes a ramp and a bump that creates a directional engagement: the ramp allows insertion in one direction, and the bump provides positive locking when rotated. This asymmetric element provides a simple yet effective way to secure both round and square trims with a single rotational motion, maintaining versatility while avoiding the complexity of multiple attachment mechanisms.
3Strength
If traditional mechanical fastening methods are used, then secure attachment is achieved, but assembly and disassembly become time-consuming
Solution Approach 1:
The mounting system transitions from static mechanical fastening (screws, clips) to a dynamic bayonet engagement that requires motion for both attachment and detachment. The assembly process involves inserting the trim into the circular opening and rotating it to engage the bayonet feature, while disassembly involves rotating the trim to disengage and then removing it. This dynamic mechanism provides secure attachment through the bayonet lock while maintaining ease of operation through simple rotational motions, eliminating the need for tools and multiple fastening steps.
Solution Approach 2:
The bayonet mounting mechanism is designed to be self-servicing, requiring no external tools or additional fastening components. The ramp and bump features of the bayonet mechanism automatically engage and lock the trim in place through the rotational motion itself, without requiring separate securing steps. The trim member's own geometry (circular or square opening) works in conjunction with the bayonet feature to create the self-securing connection, making the system both strong and easy to operate.
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 design significantly reduces assembly time and complexity, enhances the robustness of the assembly process, and provides a universal attachment method for both round and square trims, reducing the likelihood of assembly errors and costs while ensuring secure installation.
Implementation Method 1
an LED chip removably connected to a front surface of a rear wall of a heatsink
Implementation Method 2
The heatsink further comprises a plurality of fins
Implementation Method 3
The LED connector is secured to the LED chip and the heatsink by a compressive force
Implementation Method 4
The LED downlight assembly creates a snap-fit engagement between the lens and the mixing chamber
Implementation Method 5
The twist and lock trim system is a frictional engagement between a slotted circular disk that is part of the trim
Data Source
AI summary
A downlight lighting assembly comprising a plurality of notches and engaging members to ease the alignment and assembly of the components. The downlight lighting assembly comprises an LED chip removably connected to a heatsink with a mixing chamber secured to the heatsink, where securing the mixing chamber to the heatsink provides the compressive force for an LED connector to engage and provide the electrical connection to the LED chip. The heatsink also has a plurality of protrusions on its upper edge to engage a lower wall of a reflector to secure the reflector to the lighting assembly.