Downlight Elastic Arms and Fire Stoppers
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Solution Overview
Problem
Conventional downlight devices lack effective fire safety features, as fires can escape from cavities during installation, posing a significant danger to daily life and property.
Innovation Solution
A downlight apparatus design incorporating a light source, driver, metal rim, and elastic arms that elastically engage the ceiling cavity edge to prevent fire escape, along with a temperature sensor to automatically turn off the light source and activate an emergency light when ambient temperature exceeds a threshold, and a light passing cover with a ladder structure to prevent water ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional downlight devices are installed in ceiling cavities, then lighting function is provided, but fire safety is compromised as fires can escape from cavities
Solution Approach 1:
The patent applies preliminary anti-action by pre-installing fire-resistant sealing structures (fire stoppers, sealants, or fire-resistant materials) in the ceiling cavity before downlight installation. This prevents fire from escaping through the cavity opening, addressing the fire safety issue before it can occur during operation.
Solution Approach 2:
The patent introduces intermediary fire-resistant materials or sealing components between the downlight device and the ceiling cavity. These intermediaries act as barriers that block fire propagation and escape, while still allowing the downlight to function normally. Examples include fire-resistant gaskets, sealants, or fire stoppers positioned at the cavity interface.
2Reliability
If fire prevention structures are added to downlight devices, then fire safety is improved, but device complexity increases
Solution Approach 1:
The patent merges fire-resistant functions with existing downlight components rather than adding separate complex systems. For example, fire-resistant materials are integrated into the housing or mounting structure, and temperature sensors are combined with existing control circuits. This approach improves fire safety while minimizing increases in device complexity.
Solution Approach 2:
The patent designs fire safety features that serve multiple functions. For instance, the housing structure simultaneously provides mechanical support, heat dissipation, and fire resistance. Temperature sensors not only detect fire risks but also monitor operating conditions for optimal lighting performance. This multi-functionality reduces overall device complexity while enhancing fire safety.
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 design effectively prevents accidental fires from escaping and automatically responds to high temperatures, enhancing fire safety and reliability during installation and operation.
Implementation Method 1
two elastic arms are attached to one of the metal rim and the light holder for elastically pressing the metal rim to engage an cavity edge
Implementation Method 2
a temperature sensor to automatically turn off the light source and activate an emergency light when ambient temperature exceeds a threshold
Implementation Method 3
The driver converts an external power to a driving current to be used by the light source
Data Source
AI summary
A downlight apparatus includes a light source, a driver, a light holder, a metal rim and two elastic arms. The driver converts an external power to a driving current to be used by the light source. The light holder stores the light source in an holder space of the light holder. The light holder is placed inside a cavity of a ceiling. The metal rim is connected to a bottom side of the light holder. The two elastic arms are attached to one of the metal rim and the light holder for elastically pressing the metal rim to engage an cavity edge of the cavity of the ceiling for concealing the cavity and preventing an accidental fire to escape from the cavity of the ceiling to outside of the cavity of the ceiling.