Heatsink Retainer Assembly Wire Anchor Alignment
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Solution Overview
Problem
Existing retention hardware for heatsinks on printed circuit boards is complex, difficult to assemble, and prone to misalignment, leading to compromised performance and safety hazards due to small, loose parts and the need for precise alignment of mounting holes.
Innovation Solution
A heatsink retainer assembly featuring a retention wire with slidably mounted anchors that can be easily aligned with mounting holes, eliminating the need for separate end fittings and allowing for a range of mounting hole locations, with retention features that secure the anchor in place without requiring precise hole alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional retention hardware with separate end fittings and anchors is used, then the heatsink can be secured to the PCB, but the assembly process becomes complex and time-consuming due to multiple small parts requiring precise alignment
Solution Approach 1:
The patent combines the end fitting and anchor into a single integrated retention element. This single component includes a body with a retention feature that directly engages with the wire, eliminating the need for separate end fittings and anchors. The integration reduces the number of parts from multiple small components to one unified element, simplifying assembly while maintaining secure heatsink retention.
Solution Approach 2:
The retention element serves multiple functions within a single component: it provides structural support, engages with the wire through its retention feature, and secures the heatsink to the PCB. This multi-functional design eliminates the need for separate specialized components for each function, reducing assembly complexity.
2Strength
If separate end fittings are crimped onto the wire, then the wire can be fastened to anchors, but the manufacturing process becomes difficult and time-consuming
Solution Approach 1:
The retention feature is integrated into the body of the retention element rather than being a separate end fitting that requires crimping. This integration allows the retention feature to be formed as part of the molding process, eliminating the separate crimping operation and simplifying manufacturing while maintaining secure wire fastening.
3Reliability
If anchors are inserted from the bottom side of the PCB, then they can engage with end fittings, but the small loose parts are prone to being fumbled or lost
Solution Approach 1:
By integrating the anchor and end fitting into a single retention element, the design eliminates small loose parts that are prone to being fumbled or lost. The single component approach ensures that all retention functions are contained in one piece that is easier to handle and less likely to be misplaced during assembly.
4Manufacturing precision
If mounting holes are accurately located below end fittings, then proper assembly alignment is achieved, but the PCB and retention hardware must be precisely designed to fit each other
Solution Approach 1:
The integration of the retention feature into the retention element body provides more flexibility in mounting hole location. The retention feature can engage with the wire at various positions along the wire length, reducing the need for precise alignment between mounting holes and specific locations on the retention hardware. This reduces the coupling between PCB design and retention hardware design.
Data Source
AI summary
A heatsink retainer assembly, and components of the heatsink retainer assembly, are described. The heatsink retainer assembly includes one or more heatsink anchors mounted on a heatsink retention wire between several stops. The anchors include channels to receive the retention wire such that the anchors can slide over the retention wire between the stops. The stops retain the anchors on the retention wire. The anchors can be inserted into respective mounting holes of a carrier substrate by pressing the anchors into the mounting holes on a side of the carrier substrate carrying a heat source. A heatsink can be mounted on the heat source and the retention wire can extend over the heatsink to retain the heatsink against the heat source when the anchors are secured to the carrier substrate. Other embodiments are described and claimed.