Lighting Fixture Support Rail Structure for PCB Retention
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Solution Overview
Problem
The circuit board in lighting fixtures with a high length-to-diameter ratio is prone to detachment from the guide rail groove due to the weight of electrical components, affecting light emission and reducing the service life of the fixture.
Innovation Solution
A lighting fixture design featuring a guide rail on the inner sidewall extending along the cavity length, with a stand comprising opposing support brackets and a connection crossbeam that secures the circuit board along its width, enhancing structural strength and preventing detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the circuit board is installed in the guide rail groove, then the lighting fixture can be assembled, but the circuit board is prone to detachment due to the weight of electrical components
Solution Approach 1:
The support structure is divided into multiple components: support brackets at both ends of the circuit board and a crossbeam connecting them. This segmentation allows each component to bear specific portions of the load, preventing the circuit board from detaching while maintaining ease of assembly through modular installation.
Solution Approach 2:
The crossbeam extends in the width direction of the circuit board, adding a dimensional support that prevents detachment. This horizontal reinforcement across the width direction complements the vertical guide rail groove, creating a multi-dimensional fixation system that securely holds the circuit board despite the weight of electrical components.
2Ease of manufacture
If the circuit board is secured in the guide rail, then assembly is simplified, but the circuit board may deform under the weight of electrical components
Solution Approach 1:
The support structure segments the load-bearing function across multiple points: support brackets at both ends and a crossbeam in between. This distributed support system prevents deformation by eliminating excessive bending moments on any single point of the circuit board, while maintaining simple assembly procedures.
Solution Approach 2:
The support structure combines rigid materials to form a composite reinforcement system. The crossbeam and support brackets work together as a composite structural element that provides enhanced stiffness and strength, preventing circuit board deformation under load while keeping the assembly process simple.
3Reliability
If a support structure is added to prevent detachment, then reliability improves, but device complexity increases
Solution Approach 1:
The support structure is segmented into distinct, easily installable components: support brackets and a crossbeam. This segmentation allows the structure to be added modularly without complicating the overall device architecture, maintaining reliability while avoiding unnecessary complexity through clear functional division.
Solution Approach 2:
The crossbeam and support brackets serve multiple functions: they prevent circuit board detachment, provide structural reinforcement, and maintain positioning accuracy. This multi-functionality reduces the need for additional separate components, thereby improving reliability without significantly increasing device complexity.
Data Source
AI summary
The present disclosure provides a lighting fixture. The lighting fixture includes a light tube, a light source, a circuit board, and a stand. The light tube is provided with a guide rail used to clamp a substrate. The stand includes a first support bracket and a second support bracket that are opposite to each other, and a connection crossbeam. The first supporting bracket and the second supporting bracket are connected to two sides of the circuit board, and the connection crossbeam provides a support force to the first supporting bracket and the second supporting bracket.