Lamp Holder Preload Stop for Torque Control and Heat Transfer
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Solution Overview
Problem
Existing lamp holders for LEDs lack efficient preloading of spring elements during mounting, which affects heat transfer and can lead to damage from excessive tightening torque, and they often require non-standard, costly attachment elements.
Innovation Solution
A lamp holder design with a preloaded spring element that includes a preload stop to limit attachment torque and ensure optimal contact pressure between the heat conducting element and the lamp component, using standardized, cost-effective attachment elements and a spring arm configuration that prevents plastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-standard threaded bolts with diameter enlarging contact shoulders are used to prevent damage to the holder element, then the holder element is protected from excessive tightening torque, but the manufacturing cost increases and standardized attachment elements cannot be used
Solution Approach 1:
The attachment element is divided into two separate components: a standardized threaded bolt for attachment and a separate stop element that limits penetration depth. This segmentation allows each component to be optimized independently - the bolt can be a standard off-the-shelf component while the stop element provides the protective function, thereby reducing manufacturing costs while maintaining reliability.
Solution Approach 2:
A stop element acts as an intermediary component between the threaded bolt and the holder element. This intermediary limits the penetration depth of the bolt by contacting the holder element's surface, thereby preventing excessive tightening torque without requiring modification of the bolt itself. This allows use of standardized bolts while protecting the holder element.
2Temperature
If the spring element is preloaded during mounting to increase heat transfer, then heat transfer is improved, but the risk of plastic deformation increases without a preload stop
Solution Approach 1:
The stop element is pre-positioned on the holder element before the threaded bolt is fully tightened. This preliminary action establishes a predetermined limit for bolt penetration, ensuring that the spring element is preloaded to the correct amount for optimal heat transfer while preventing over-tightening that would cause plastic deformation. The preload amount can be precisely controlled by adjusting the stop element's position.
3Ease of manufacture
If standardized attachment elements are used to reduce cost, then manufacturing cost decreases, but the ability to control attachment torque and prevent damage is reduced
Solution Approach 1:
The attachment system is segmented into a standardized threaded bolt (for cost efficiency) and a separate stop element (for torque control). The stop element compensates for the lack of integrated torque control in standardized bolts by providing a mechanical limit to penetration depth, thereby maintaining reliability while enabling use of cheaper standardized components.
Solution Approach 2:
The stop element serves as an intermediary that bridges the gap between standardized attachment elements and the need for precise torque control. By contacting the holder element's surface at a predetermined position, it mediates the attachment process to ensure optimal preload without damage, allowing use of standardized bolts while maintaining attachment quality.
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 enhances heat transfer by optimizing contact forces and limits attachment torque, preventing damage while using cheaper, easier-to-handle standardized components.
Implementation Method 1
at least one spring element, wherein the holder housing component including the locking grooves is liftable against a spring force of the at least one spring element
Implementation Method 2
a central heat conducting element... facilitates heat transfer from the lamp to the lamp component
Data Source
AI summary
A lamp holder for receiving a lamp including a LED, the lamp holder including locking cams radially extending from a lamp base; a central heat conducting element; a lamp holder housing component that is attachable by fasteners at a light fixture component; a central cut-out for receiving the lamp base, wherein the cutout is enclosed by a lamp holder housing wall which is provided with insertion grooves which are oriented substantially perpendicular to the light fixture component; locking grooves respectively originating from the insertion grooves which locking grooves are oriented parallel to the light fixture component for receiving the locking cams extending from the lamp base; and at least one spring element, wherein the holder housing component including the locking grooves is liftable against a spring force of the at least one spring element through an insertion and rotation movement when inserting and locking the lamp.