Heat sink connector pin and assembly

Patent metadata

Field	Value
Publication number	US-10117356-B2
Application number	US-201615362064-A
Country	US
Kind code	B2
Filing date	Nov 28, 2016
Priority date	Nov 28, 2016
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A heat sink connector pin includes a pin assembly with linkage that provides the movement of a pin head or cap in a downward movement to cause multiple movable fingers at an opposing end of the pin to mechanically move from a retracted position that allows insertion of the heat sink connector pin through an opening in the substrate, such as a through-hole, to move to an outward extended position so that the multiple fingers engage or grasp a bottom surface of the substrate. In one example, the movable fingers are rotatably connected to share a same rotational axis with each other. In one example, the pin assembly includes a sleeve adapted to receive the shaft structure and is adapted to engage with the pin head. The sleeve includes a substrate stop surface adapted to contact a top surface of the substrate during insertion of the pin through the substrate.

First claim

What is claimed is:

1. A heat sink connector pin for attaching a heatsink to a top surface of a substrate and in thermal contact with a heat dissipating device, the pin comprising:
a pin assembly comprising a pin head at a first end and a plurality of moveable fingers at a second end, a shaft structure operably engaged to the moveable fingers and to the pin head, the shaft structure configured for downward movement as the pin head moves downward, the plurality of moveable fingers configured to rotate about an axis and be in a retracted position that allows insertion of the second end through an opening in the substrate without deforming the moveable fingers and configured to mechanically extend in an outward position in a manner that positions the plurality of fingers to contact a bottom surface of the substrate, in response to downward movement of the shaft structure.

2. The heat sink connector pin of claim 1 wherein each of the plurality of the movable fingers comprises a substrate engagement surface adapted to engage a bottom surface of the substrate when in the outward extended position.

3. The heat sink connector pin of claim 1 wherein the pin assembly comprises a sleeve adapted to receive the shaft structure and adapted to engage with the pin head and wherein the sleeve comprises a substrate stop surface adapted to contact a top surface of the substrate during insertion of the second end through the substrate opening.

4. The heat sink connector pin of claim 3 wherein the pin assembly comprises a spring configured around the sleeve.

5. A heat sink assembly comprising:
a substrate supporting a heat generating device, the substrate defining at least one through-hole;
a heat sink, in thermal contact with the heat generating device;
a heat sink connector pin inserted through the through-hole of the substrate and configured to affix the heat sink to the substrate, the heat sink connector pin comprising:
a pin head at a first end and a plurality of moveable fingers at a second end, a shaft structure operably engaged to the moveable fingers and to the pin head, the shaft structure configured for downward movement as the pin head moves downward, the plurality of moveable fingers configured to rotate about an axis and be in a retracted position that allows insertion of the second end through the at least one through-hole in the substrate without deforming the moveable fingers and configured to mechanically extend in an outward position in a manner that positions the plurality of fingers to contact a bottom surface of the substrate, in response to downward movement of the shaft structure.

6. The heat sink assembly of claim 5 wherein each of the plurality of the movable fingers comprises a substrate engagement surface adapted to engage a bottom surface of the substrate when in the outward extended position.

7. The heat sink assembly of claim 5 wherein the pin assembly comprises a sleeve adapted to receive the shaft structure and adapted to engage with the pin head and wherein the sleeve comprises a substrate stop surface adapted to contact a top surface of the substrate during insertion of the second end through the substrate opening.

8. A heat sink connector pin for attaching a heatsink to a top surface of a substrate and in thermal contact with a heat dissipating device comprising:
a pin assembly comprising:
a pin head at a first end;
a plurality of moveable fingers at a second end of the pin assembly;
a shaft structure operably engaged to the moveable fingers and to the pin head, the shaft structure configured for downward movement as the pin head moves downward, the plurality of moveable fingers configured to be in a retracted position that allows insertion of the second end through an opening in the substrate and configured to mechanically extend in an outward position in a manner that positions the plurality of fingers to contact a bottom surface of the substrate, in response to downward movement of the shaft structure;
a sleeve adapted to receive the shaft structure and adapted to engage with the pin head and wherein the sleeve comprises a heat sink stop surface and a substrate stop surface, the substrate stop surface adapted to contact a top surface of the substrate during insertion of the second end through the substrate opening, and
wherein each of the plurality of the movable fingers comprises a substrate engagement surface adapted to engage a bottom surface of the substrate when in the outward extended position.

9. The heat sink connector pin of claim 8 wherein the plurality of movable fingers are rotatably connected to share a same rotational axis with each other.

10. The heat sink connector pin of claim 9 wherein the sleeve comprises a threaded portion and the pin head comprises a corresponding threaded portion adapted to engage with the threaded portion of the sleeve and wherein the sleeve comprises a finger guide portion adapted to receive the plurality of fingers and comprising channels configured to guide the plurality of moveable fingers when moving from the retracted position to the outwardly extended position.

11. The heat sink connector pin of claim 10 wherein the pin assembly comprises a spring configured around the sleeve.

12. The heat sink assembly of claim 11 wherein the finger guide portion comprises a finger engagement surface configured to contact a heel portion of a finger.

13. A heat sink connector pin for attaching a heatsink to a top surface of a substrate and in thermal contact with a heat dissipating device, the pin comprising:
a pin assembly comprising a pin head at a first end and a plurality of moveable fingers at a second end, a shaft structure operably engaged to the moveable fingers and to the pin head, the shaft structure configured for downward movement as the pin head moves downward, the plurality of moveable fingers configured to be in a retracted position that allows insertion of the second end through an opening in the substrate without deforming the moveable fingers and configured to mechanically extend in an outward position in a manner that positions the plurality of fingers to contact a bottom surface of the substrate, in response to downward movement of the shaft structure; and
wherein the plurality of movable fingers are rotatably connected to share a same rotational axis with each other.

14. A heat sink connector pin for attaching a heatsink to a top surface of a substrate and in thermal contact with a heat dissipating device, the pin comprising:
a pin assembly comprising a pin head at a first end and a plurality of moveable fingers at a second end, a shaft structure operably engaged to the moveable fingers and to the pin head, the shaft structure configured for downward movement as the pin head moves downward, the plurality of moveable fingers configured to be in a retracted position that allows insertion of the second end through an opening in the substrate without deforming the moveable fingers and configured to mechanically extend in an outward position in a manner that positions the plurality of fingers to contact a bottom surface of the substrate, in response to downward movement of the shaft structure;
wherein the pin assembly comprises a sleeve adapted to receive the shaft structure and adapted to engage with the pin head and wherein the sleeve comprises a substrate stop surface adapted to contact a top surface of the substrate during insertion of the second end through the substrate opening; and
wherein the sleeve comprises a threaded portion and the pin head comprises a corresponding threaded portion adapted to engage with the threaded portion of the sleeve and wherein

Assignees

• Advanced Micro Devices Inc

Inventors

• Lambert Donald L

Classifications

• H10W40/611

  Bolts or screws · CPC title

• H10W40/641

  Snap-on arrangements, e.g. clips · CPC title

• F16B21/12

  with locking-pins or split-pins thrust into holes · CPC title

• H05K7/20154

  Heat dissipaters coupled to components · CPC title

• H05K2201/09063

  Holes or slots in insulating substrate not used for electrical connections · CPC title