Heat Sink Attachment Using Spring Clips for Compact Electronics
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Solution Overview
Problem
In compact electronic devices like set top boxes, effective heat management is challenging due to space constraints and the need for low-cost, quiet solutions that prevent heat sinks from rattling and ensure good thermal contact, while existing methods increase costs and occupy additional space.
Innovation Solution
The use of spring clips or bend tabs to secure heat sinks to circuit boards, providing downward force and preventing rattling, while integrating a shield for additional attachment points that save space and reduce costs by eliminating the need for additional mounting components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat sinks are used to dissipate heat, then heat management is improved, but heat sinks rattle and do not make good contact
Solution Approach 1:
The patent employs spring clips that are elastically deformable, allowing them to dynamically adapt to the heat sink's position and maintain constant contact pressure. The spring clips can flex and adjust themselves to compensate for manufacturing tolerances and thermal expansion, ensuring reliable thermal contact while preventing rattling through continuous elastic pressure.
2Reliability
If additional parts are used to hold heat sinks down, then contact stability is improved, but space on printed circuit boards increases
Solution Approach 1:
The patent integrates the spring clips directly into the shield structure, combining two separate components (shield and mounting clips) into a single unified part. This integration eliminates the need for separate mounting components, reduces the number of parts, and conserves PCB space while maintaining reliable heat sink fixation.
3Reliability
If additional parts are used to secure heat sinks, then fixation reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the shield and spring clips into a single integrated component, reducing the total part count and simplifying the manufacturing process. This integration eliminates the need for separate procurement, inventory management, and assembly steps for multiple components, thereby reducing manufacturing costs while maintaining secure heat sink mounting.
4Temperature
If fans are used instead of heat sinks, then heat dissipation is improved, but device noise increases
Solution Approach 1:
The patent replaces the mechanical moving system of fans (rotating blades requiring power and generating noise) with a passive thermal conduction system using heat sinks and spring clips. This substitution eliminates the need for active mechanical components, reducing device noise while maintaining effective heat dissipation through thermal conduction and convection from the heat sink fins.
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
This solution effectively manages heat dissipation in compact electronic devices, ensuring reliable thermal contact and reducing costs by eliminating the need for extra mounting components, thus enhancing long-term performance and versatility.
Implementation Method 1
spring clips or bend tabs having distal contact prongs that contact and apply downward force on the horizontal base
Implementation Method 2
a heat sink, disposed over the circuit board, through which heat from the circuit board and the components thereon is released or dissipated
Data Source
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AI summary
There is provided an electronic device. The electronic device includes a circuit board having heat generating components thereon. The electronic device further includes spring clips or bend tabs. The electronic device also includes a heat sink, disposed over the circuit board, through which heat from the circuit board and the components thereon is released. The heat sink has a generally flat horizontal base and a series of vertically directed fins. The heat sink is secured to at least one of the circuit board and at least one of the components thereon by the spring clips or bend tabs being positioned at a periphery of the horizontal base. The spring clips or bend tabs have distal contact prongs that contact and apply downward force on the horizontal base.