Fastener

{
  "publication_number": "US8934247B2",
  "country": "US",
  "kind": "B2",
  "title": "Fastener",
  "abstract": "A fastener includes a main body, a washer, and a spring. The main body includes a pole, two spaced latches extending from a top end of the pole, and two spaced legs extending down from a bottom end of the pole opposite to the latches. An annular blocking portion protrudes out from a circumference of the pole adjacent to the legs. A tapered first projection protrudes from an outer side of a distal end of each latch opposite to the other latch. A tapered second projection protrudes from an outer side of a distal end of each leg opposite to the other leg. The washer and the spring are fitted around the pole, and the spring is sandwiched between the washer and the blocking piece.",
  "claims": [
    "1. A fastener, comprising: a main body comprising a pole, two spaced latches extending from a top end of the pole, two spaced legs extending down from a bottom end of the pole opposite to the latches; a blocking portion protruding out from the pole adjacent to the legs, a tapered first projection protruding from an outer side of a distal end of each latch opposite to the other latch, a tapered second projection protruding from an outer side of a distal end of each leg opposite to the other leg; a washer fitted around the pole; and a spring fitted around the pole and sandwiched between the washer and the blocking piece.",
    "2. An assembly, comprising: a circuit board defining a through hole; a heat sink comprising a base and a plurality of fins extending from the base, the base defining a fixing hole; and a fastener comprising a pole, two spaced latches extending from a top end of the pole, and two spaced legs extending down from a bottom end of the pole opposite to the latches; a blocking portion protruding out from the pole adjacent to the legs, a tapered first projection protruding from an outer side of a distal end of each latch opposite to the other latch, a tapered second projection protruding from an outer side of a distal end of each leg opposite to the other leg; wherein a washer is fitted around the pole; a spring is fitted around the pole and sandwiched between the washer and the blocking piece; wherein the latches extend through the fixing hole of the heat sink, the first projection and the washer sandwich the base, the legs extend through the through hole, the blocking portion and the second projection sandwich the circuit board."
  ],
  "description_excerpt": "1. Technical Field\n\nThe present disclosure relates to a fastener.\n\n2. Description of Related Art\n\nScrews are generally needed in mounting a heat sink to a circuit board. However, screws often have an enlarged head and need a screwdriver to be installed. As a result, some fins of the heat sinks may need to be cutoff to provide enough space to install the screws, which is tedious and reduces the heat dissipation area.\n\nMany aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views.\n\nFIG. 1 is an isometric view of an exemplary embodiment of a fastener.\n\nFIG. 2 is a cross-sectional view showing two fasteners of FIG. 1 mounting a heat sink to a circuit board.\n\nThe disclosure, including the accompanying drawings, is illustrated by way of example and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.\n\nReferring to FIGS. 1 and 2, an exemplary embodiment of a fastener is provided for mounting a heat sink 10 to a circuit board 20.\n\nAn electronic element 22, such as a central processing unit, is mounted on the circuit board 20. The circuit board 20 defines two through holes 24, respectively at opposite sides of the electronic element 22.",
  "cpc": [
    "H10W 40/60",
    "F16B 5/065",
    "H10W 40/611",
    "H10W 40/625",
    "Y10T 403/602"
  ],
  "ipc": [
    "H05K 7/20"
  ],
  "assignees": [
    "Hon Hai Precision Industry Co Ltd"
  ],
  "inventors": [
    "Tsung-Ming Chen"
  ],
  "filing_date": "2012-08-30",
  "publication_date": "2015-01-13",
  "grant_date": "2015-01-13",
  "priority_date": "2012-08-22",
  "application_number": "US-201213598653-A",
  "family_id": "50147835",
  "cited_by_count": 9,
  "citations": [
    "US5730210A",
    "US6105215A",
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    "US20030159819A1",
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    "US7218525B2",
    "US7382618B2",
    "US20080192440A1",
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    "US8144470B2"
  ]
}