Heat sink assembly and clip thereof

{
  "publication_number": "US9847273B2",
  "country": "US",
  "kind": "B2",
  "title": "Heat sink assembly and clip thereof",
  "abstract": "A clip for fixing a heat sink on a retaining bracket includes an elastic supporter, an operating member, a movable fastener and a fixing bar. Two ends of the elastic supporter have a connecting portion and a first buckle portion, respectively. The operating member has a resisting portion, a pivot portion and an operating bar. The pivot portion pivots to the connecting portion. The movable fastener installs on the resisting portion and the connecting portion, and includes two sliding slots, a resisting surface and a second buckle portion. The resisting portion has an arc surface for resisting against the resisting surface. The distance between the apex of the arc surface and the pivot portion is the largest distance between the arc surface and the pivot portion. When the clip is locked, the junction of the resisting portion and the resisting surface excludes the apex of the arc surface.",
  "claims": [
    "1. A clip for fixing a heat sink on a retaining bracket, comprising: an elastic supporter, wherein two ends of the elastic supporter have a connecting portion and a first buckle portion, respectively; an operating member having a first limiting portion, a resisting portion, a pivot portion and an operating bar, wherein the pivot portion pivots to the connecting portion, the first limiting portion directly connects the resisting portion and the operating bar, and the first limiting portion is disposed between the resisting portion and the operating bar, the resisting portion includes a first side wall, a second side wall and an arc surface, the first side wall connects to the arc surface and the second side wall, the arc surface and the second sidewall are not directly connected to each other, and the second side wall and the first limiting portion connect to each other to form a bend, wherein the arc surface, the first side wall, the second side wall and the first limiting portion are clockwise or counterclockwise located around the pivot portion in sequence to form an enclosed area, and the pivot portion passes through the enclosed area; a movable fastener installed on the resisting portion and the connecting portion, wherein the movable fastener comprises two side walls, a resisting surface connecting the two side walls, and a second buckle portion, the two side walls and the resisting surface define an accommodating space underneath the resisting surface for receiving the resisting portion of the operating member, and when the operating bar is pulled, the resisting portion is rotated accordingly to resist against the resisting surface so that the second buckle portion moves upwards to lock the clip; and a fixing bar disposed under the pivot portion and inserted into the two side walls of the movable fastener, wherein the arc surface is for resisting against the resisting surface of the movable fastener, the distance between an apex of the arc surface and the pivot portion is the largest distance between the arc surface and the pivot portion, and wherein when the resisting portion is rotated, the apex of the arc surface contacts the resisting surface firstly and then the first limiting portion contacts against the connecting portion due to the bend, so that when the clip is locked, the junction of the resisting portion and the resisting surface excludes the apex of the arc surface.",
    "2. The clip according to claim 1, wherein each of two ends of the connecting portion has a recess, and the pivot portion is received in the recesses.",
    "3. The clip according to claim 1, wherein the operating member further comprises a second limiting portion disposed between the resisting portion and the operating bar.",
    "4. The clip according to claim 1, wherein the side wall has a longitudinal extended sliding slot, the fixing bar passes through the sliding slots of the side walls, and when the clip is locked, the fixing bar is located at a bottom of each of the sliding slots.",
    "5. The clip according to claim 1, wherein each of two opposite sides of the retaining bracket has a protrusion, and when the clip is locked, the first buckle portion and the second buckle portion are locked with the protrusions, respectively.",
    "6. The clip according to claim 1, wherein the resisting portion rotates upwardly about the pivot portion to contact against the resisting surface and then the movable fastener moves upwardly.",
    "7. The heat sink assembly for dissipating heat generated by an electronic device, comprising: a retaining bracket disposed at the periphery of the electronic device; a heat sink disposed corresponding to the retaining bracket and the electronic device; and a clip mounted on the heat sink and comprising: an elastic supporter, wherein two ends of the elastic supporter have a connecting portion and a first buckle portion, respectively, an operating member having a first limiting portion, a resisting portion, a pivot portion and an operating bar, wherein the pivot portion pivots to the connecting portion, the first limiting portion directly connects the resisting portion and the operating bar, and the first limiting portion is disposed between the resisting portion and the operating bar, the resisting portion includes a first side wall, a second side wall and an arc surface, the first side wall connects to the arc surface and the second side wall, the arc surface and the second sidewall are not directly connected to each other, and the second side wall and the first limiting portion connect to each other to form a bend, wherein the arc surface, the first side wall, the second side wall and the first limiting portion are clockwise or counterclockwise located around the pivot portion in sequence to form an enclosed area, and the pivot portion passes through the enclosed area; a movable fastener installed on the resisting portion and the connecting portion, wherein the movable fastener comprises two sliding slots, a resisting surface and a second buckle portion; and a fixing bar disposed under the pivot portion and inserted into the two sliding slots of the movable fastener, wherein the arc surface is for resisting against the resisting surface of the movable fastener, the distance between an apex of the arc surface and the pivot portion is the largest distance between the arc surface and the pivot portion, wherein when the resisting portion is rotated, the apex of the arc surface contacts the resisting surface firstly and then the first limiting portion contacts against the connecting portion due to the bend, so that when the clip is locked, the junction of the resisting portion and the resisting surface excludes the apex of the arc surface.",
    "8. The heat sink assembly according to claim 7, wherein each of two ends of the connecting portion has a recess, and the pivot portion is received in the recesses.",
    "9. The heat sink assembly according to claim 7, wherein the operating member further comprises a second limiting portion disposed between the resisting portion and the operating bar.",
    "10. The heat sink assembly according to claim 7, wherein each of two side walls of the movable fastener has one of the sliding slots longitudinal extended, the fixing bar passes through the sliding slots of the side walls, and when the clip is locked, the fixing bar is located at a bottom of each of the sliding slots.",
    "11. The heat sink assembly according to claim 7, wherein each of two opposite sides of the retaining bracket has a protrusion, and when the clip is locked, the first buckle portion and the second buckle portion are locked with the protrusions, respectively.",
    "12. The heat sink assembly according to claim 7, wherein the resisting portion rotates upwardly about the pivot portion to contact against the resisting surface and then the movable fastener moves upwardly."
  ],
  "description_excerpt": "Field of Invention\n\nThe present invention relates to a heat sink assembly and clip thereof.\n\nRelated Art\n\nDue to the rapid progress of electronic industry, the electronic modules, such as the CPU, have been greatly improved. Accompanying the improved performance of the CPU, the generated heat is increased. In order to effectively remove the heat generated by the electronic module, a heat sink is commonly disposed adjacent to the CPU or other electronic modules for rapidly taking the heat away. Thus, the CPU or electronic module can operate at the normal working temperature so as to extend the lifespan of the products.\n\nIn order to make the heat sink closely attach to the surface of the electronic device, a retaining bracket is usually disposed surrounding the electronic device, and then the heat sink is disposed on the retaining bracket and fastened by a clip. Taiwan Patent No. I296,497 discloses a clip including a clip body, a movable fastener and an operating bar. The clip body is mounted on the heat sink, and the movable fastener and the operating bar are correspondingly disposed at one side of the clip body. The movable fastener has a resisting portion and a pulling portion. When the pulling portion is pulled, the resisting portion contacts against the movable fastener so that the movable fastener moves with relative to the clip body and presses the heat sink to be fixed on the retaining bracket.\n\nHowever, the conventional clip has a very complicated installation procedure.",
  "cpc": [
    "H10W 40/641",
    "F16B 2/08",
    "F16B 2/22",
    "H01L 23/4093",
    "Y10T 403/595"
  ],
  "ipc": [
    "F16B 2/08",
    "F16B 2/22",
    "H01L 23/40"
  ],
  "assignees": [
    "Delta Electronics Inc"
  ],
  "inventors": [
    "Yu-Hsien Lin",
    "Li-Kuang Tan"
  ],
  "filing_date": "2013-07-18",
  "publication_date": "2017-12-19",
  "grant_date": "2017-12-19",
  "priority_date": "2013-03-15",
  "application_number": "US-201313945376-A",
  "family_id": "51505577",
  "cited_by_count": 1,
  "citations": [
    "US6318452B1",
    "US7061764B2",
    "TWI296497B",
    "US7644751B2",
    "US7292442B2",
    "US7397663B2",
    "US20080256764A1"
  ]
}