Modular Downlight Assembly with Scissor Linkage and Gear Synchronization
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Solution Overview
Problem
Existing downlight assemblies lack modularity, allowing for variable numbers of similar units to be mounted or removed from a single back housing in a ceiling cavity, and do not incorporate individual power supplies or precise aiming mechanisms.
Innovation Solution
A modular downlight assembly with a back housing and extensible scissor/toggle linkage, featuring gear teeth for synchronized movement, individual power supplies within each module, and angular scales for precise aiming, enabling easy addition/removal and precise positioning of modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a non-modular downlight assembly is used, then the structure is simpler, but the ability to selectively add/remove modules and achieve variable numbers of units is lost
Solution Approach 1:
The downlight assembly is divided into separate modular units (lamp holder housing, back housing, power supply modules) that can be independently assembled and disassembled. Each module can be selectively added or removed from the back housing through the ceiling cavity opening, enabling variable configurations without requiring complete assembly replacement.
Solution Approach 2:
The lamp holder housing is suspended within the back housing through a nested arrangement where the scissor linkage mechanism allows the lamp assembly to be inserted through and positioned within the ceiling cavity opening. The power supply modules are also nested within the back housing structure, allowing modular assembly from below the ceiling.
2Adaptability or versatility
If individual power supplies are incorporated with each module, then each module becomes independent and more versatile, but the overall system complexity increases
Solution Approach 1:
The power supply system is segmented into individual power supply modules that are integrated with each lamp holder housing unit. Each module contains its own transformer or ballast, allowing independent operation and selection of power supply types (transformer for incandescent, ballast for fluorescent) for each lamp assembly without requiring a centralized power distribution system.
3Measurement precision
If angular scales or protractors are incorporated in each module, then precise aiming adjustment is enabled, but the device complexity increases
Solution Approach 1:
Angular scales or protractors are incorporated into the lamp holder housing or mounting plate, providing visual angular indicators that allow the user to readily select and determine precise angular positions for lamp rotation about vertical or horizontal axes. The angular scales provide visual feedback for accurate aiming adjustment without requiring complex electronic sensors or control systems.
4Ease of operation
If means for limiting pivotal movement are provided, then independent movement control is improved, but the device complexity increases
Solution Approach 1:
The scissor linkage mechanism provides dynamic control of pivotal movement, allowing the lamp holder housing to rotate about vertical or horizontal axes within controlled limits. The geometry of the scissor linkage naturally limits the range of motion while still permitting the necessary adjustment for aiming and lighting effects, eliminating the need for additional mechanical stops or constraints.
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
Enables flexible installation and removal of modules from below, with precise aiming capabilities and synchronized linkage movement, enhancing modularity and aiming precision.
Implementation Method 1
respective adjacent pivotal ends of uppermost arms of a dual linkage are provided with gear teeth in meshing engagement to ensure that both those uppermost arms move at the same angular rate during lowering or raising the lamp
Data Source
AI summary
A modular downlight assembly having a channel shaped back housing for mounting in a ceiling cavity and formed with a series of identical apertures receiving, respectively, when mounted in the cavity, selected similar individual downlight modules. Each module has a mounting plate with a power supply mounted on an upper back face received, concealed from view, in an aperture and a lamp housing pivotally suspended from a turnable on a lower face by a scissor linkage for extension and retraction out of and into the housing channel. A protractor for indicating rotational direction is marked on the lower face of the mounting plate. Meshed gear teeth are provided on endmost links of the two linkages of each scissor link, synchronizing their movement. Selected links have movement limiting flanges extending into paths of movement of adjacent links and of the lamp housing limiting extension, pivotal movement and rotation.