Fastening device and heat sink assembly using the same
AssigneeHon Hai Precision Industry Co., Ltd.
InventorChih-Hao Yang
Life of this patent
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Abstract
A heat sink assembly (100) includes a fastening device (20) and a heat sink (10). The fastening device includes a sleeve (24), a pin (22) received in the sleeve and a biasing means (26) disposed around the sleeve. The sleeve includes a locking portion (246) formed at a bottom end thereof. The pin includes an engaging portion (226) formed at a bottom end thereof. At least a slot (248) is defined through the locking portion of the sleeve (24). The engaging portion extends outwardly through the slot and resiliently abuts against a bottom surface of the heat sink. The biasing means is slightly deformed between a top end of the fastening device and a top surface of the heat sink, thereby keeping the fastening device in a vertical position with respect to the heat sink.
Claims14
A heat sink fastening device comprising:
- a pin comprising a body and an engaging portion formed at an end of the body;
- a sleeve comprising a main body and a locking portion formed at an end of the main body;
- and
- a biasing means disposed around the main body of the sleeve;
- wherein
- the main body of the sleeve defines axially a central bore for receiving the pin therein, at least a slot is defined through the locking portion and extends to a portion of the main body of the sleeve for receiving the engaging portion of the pin, the biasing means cooperating with the engaging portion for maintaining the fastening device in a vertical orientation when the fastening device is mounted to a heat sink.
A heat sink assembly comprising:
- a heat sink defining at least a mounting hole therein;
- and
- at least a fastening device comprising:
- a sleeve received in the at least a mounting hole of the heat sink and defining a central bore, the sleeve comprising a main body and a locking portion formed at a bottom end of the main body;
- a pin comprising a body received in the central bore of the sleeve and an engaging portion formed at a bottom end of the body;
- and
- a biasing means associated with the main body of the sleeve;
- wherein
- at least a slot is defined through the locking portion and a portion of the main body of the sleeve for receiving the engaging portion of the pin therein, the engaging portion of the pin abuts against a bottom of the heat sink and the biasing means is slightly deformed between a top end of the at least a fastening device and a top of a base of the heat sink.
An electronic assembly comprising:
- a printed circuit board having a heat generating electronic component mounted thereon;
- a heat sink mounted on the heat generating electronic component and thermally connecting therewith;
- and
- at least a fastening device fastening the heat sink to the printed circuit board so that the heat sink can have an intimate contact with the heat generating electronic component, the at least a fastening device comprising:
- a sleeve extended through the heat sink and the printed circuit board, having a bottom locking portion securely engaging with a bottom surface of the printed circuit board;
- a spring surrounding the sleeve and compressed between a top head of the sleeve and a top surface of a base of the heat sink;
- a pin extended through a bore of the sleeve, having a top cap over the top head of the sleeve and lower barbs extending out of the sleeve and located between a top surface of the printed circuit bard and a bottom surface of the heat sink.
Dependencies are inferred from the claim text.