Downlight Locking Mechanism Prevents Unintentional Detachment
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Solution Overview
Problem
Downlights with adjustable luminaire heads face the risk of unintentional detachment when the bayonet joint is released during orientation adjustments, leading to potential lamp dislodgment from the mounting frame.
Innovation Solution
Incorporation of a locking mechanism, such as a height-adjustable locking spring with a delimiting bevel and stop elements, to secure the light fixture against rotation in the releasing direction, ensuring stable attachment and preventing unintentional release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a bayonet joint is used to attach the light fixture to the mounting frame, then the light fixture can be easily and quickly attached and detached, but the light fixture may be unintentionally released when the luminaire head is adjusted
Solution Approach 1:
The locking element is designed to automatically engage with the delimiting element before the light fixture can be unintentionally released. This preliminary locking action prevents the harmful effect of accidental detachment while maintaining the ease of intentional attachment through the bayonet joint mechanism.
Solution Approach 2:
The locking element acts as an intermediary between the light fixture and mounting frame, providing an additional security layer. When the luminaire head is adjusted, the locking element prevents the bayonet joint from disengaging unintentionally, thus mediating between the adjustment motion and the attachment security.
2Adaptability or versatility
If the luminaire head is made adjustable with rotation capability, then the lighting direction can be optimized, but the risk of unintentional release of the light fixture increases
Solution Approach 1:
The locking element serves as an intermediary that decouples the rotation of the luminaire head from the attachment between the light fixture and mounting frame. This allows the luminaire head to be adjusted freely while the locking element prevents the bayonet joint from disengaging during these adjustments.
Solution Approach 2:
The locking mechanism provides preliminary protection against the harmful effect of unintentional release. By engaging the locking element before any rotation occurs, the system prevents the adverse effect of detachment while maintaining the desired adjustability of the luminaire head.
3Reliability
If a locking mechanism is added to prevent unintentional release, then the security of attachment is improved, but the device complexity increases
Solution Approach 1:
The locking element is designed to engage automatically through the existing bayonet joint motion itself. The rotational attachment movement causes the locking element to snap into place with the delimiting element, eliminating the need for separate locking actions or complex additional mechanisms. The system locks itself during the normal attachment process.
Solution Approach 2:
The locking function is merged with the existing bayonet joint attachment mechanism. The locking element and delimiting element are integrated into the same rotational motion that attaches the light fixture, combining two functions (attachment and locking) into a single unified action rather than requiring separate mechanisms.
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 locking mechanism provides secure attachment of the light fixture to the mounting frame, preventing unintentional detachment during luminaire head adjustments, while allowing targeted release for maintenance, thus enhancing safety and reliability.
Implementation Method 1
a height-adjustable locking spring with a delimiting bevel and stop elements
Data Source
AI summary
Disclosed is a downlight (100) comprising an annular mounting frame (50) to be mounted in the area of a ceiling mounting hole, and a light fixture (10) that is to be fastened to the mounting frame (50) and includes a luminaire head (30) thereon. The mounting frame (50) and the light fixture (10) are designed such that the light fixture (10) is fastened to the mounting frame (50) by twisting the former (10) relative to the latter (50), additional securing means being provided which prevent the light fixture (10) from being twisted in the unlocking direction in a mounted position.