Trim Retention Spring Clip for Recessed Lighting Fixtures
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Solution Overview
Problem
Conventional trim retention methods, such as friction clips, often fail to securely engage trims due to length, angular orientation, or shape mismatches, leading to dents, deformations, and require repeated installation attempts to achieve proper alignment, which can damage the trim and fixture housing.
Innovation Solution
A spring clip system with first and second legs joined at an apex, fixed to the trim, applies a downward force to pull the trim into the ceiling pan, allowing for adjustment and secure retention without damaging the trim or fixture housing, and enabling easy removal and rotation of the trim after installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction clips are used to retain trim, then trim retention is provided, but the trim may be damaged with dents or deformations due to excessive pressure
Solution Approach 1:
The friction clip is replaced with a spring clip that uses elastic deformation to provide retention force. The spring clip's legs are bent to create a predetermined resilient force, changing the retention mechanism from direct friction pressure to elastic spring force, which provides consistent retention without excessive pressure that causes damage.
Solution Approach 2:
The spring clip automatically adjusts its force application through elastic deformation. As the trim is installed, the spring clip's legs flex and provide the necessary retention force without requiring manual adjustment or excessive installation pressure, thereby preventing damage while ensuring secure retention.
2Reliability
If friction clips are used to retain trim, then trim retention is provided, but repeated removal and replacement is required to achieve proper alignment, degrading both trim and friction clip
Solution Approach 1:
The spring clip incorporates resilient, flexible legs that can dynamically adjust during installation. The legs are designed to flex and accommodate variations in trim positioning, allowing the trim to be properly aligned and retained in a single installation attempt without repeated removal and replacement.
3Reliability
If friction clips are used to retain trim, then trim retention is provided, but the installed orientation is not ideal due to slight deviations in installation
Solution Approach 1:
The spring clip's resilient legs are designed with specific flexibility parameters that allow them to accommodate slight deviations in installation orientation. The legs can flex to compensate for non-ideal installation conditions, ensuring the trim achieves proper orientation and retention without requiring perfect installation alignment.
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 spring clip system provides positive trim retention with automatic adjustment, ensuring the trim is flush and aligned with the ceiling, allowing for tool-less installation and easy removal, while accommodating imperfect fixture housing installations and existing trim designs.
Implementation Method 1
A spring clip has first and second legs joined by an apex wherein the legs are fixed to the trim ring in a manner to apply a downward spring biasing force
Implementation Method 2
a torsion spring clip includes first and second legs each having an extension or free end portion bent at an inclined angle to impart a downward force of the torsion spring clip to pull the trim ring toward the ceiling pan
Data Source
AI summary
A lighting fixture is provided that includes a ceiling pan having an opening with a trim received therein. The trim includes a ring with a spring clip attached thereto. The spring clip includes first and second legs having a first end joined at an apex and second free end opposite the first end. The second free ends are fixed to the trim to bias the spring clip in a downward direction to engage a top surface of the ceiling pan and bias the trim in an upward direction toward the ceiling pan. In one embodiment, the ends of the spring clip are fixed to the trim by a screw. In another embodiment, the spring clip is a torsion spring engaging the trim and includes first and second legs with a portion extending therefrom and received in an aperture in the trim. The ends are oriented at an inclined angle with respect to the legs such that when the legs are attached to the trim, the legs are biased in a downward direction with respect to the ceiling pan. The torsion spring clip can be retrofit to the trim ring.