Structure for mounting heat sink, and heat sink mounted using the structure

摘要

A new mounting structure is provided in which, when a heat sink is mounted (fixed) on a circuit board using a spring member, an anchor for fixing the spring member is formed in a very small size in plan view. In the present invention, at least one anchor for mounting a heat sink body on a circuit board is set in a projected state on the heat sink body side and both ends of a spring member are each directly or indirectly attached to an anchor, whereby the heat sink body is mounted on the circuit board. In the anchor, a main body section projecting on the circuit board is formed in a substantially circular shape or a polygonal shape. When the spring member is attached to the anchor, the spring member is attached to an attaching section in an externally fit state.

主权项

1. A structure for mounting a heat sink in which a heat sink body including a base compression-bonded to a semiconductor circuit element on a circuit board and heat radiation fins projecting from the base is mounted on the circuit board using a spring member, the structure comprising:
first and second anchors for mounting the heat sink body on the circuit board with the anchors on the circuit board in a projected state to a mounting side of the heat sink body and the spring member to be indirectly attached at each of both ends of the spring member to respective ones of the first and second anchors to attach the heat sink body on the circuit board, wherein first and second attachment pieces each formed separately from the spring member are provided at respective ones of the both ends of the spring member, the first and second attachment pieces provided at respective ones of the both ends of the spring member are provided to be capable of pivoting or sliding with respect to the spring member, the first and second anchors each include a base section to be fixed to the circuit board and a main body section for projecting to the heat sink body side from the circuit board, and an attaching section to which the respective one of the first and second attachment pieces is to be attached is formed in the main body section, the main body section of each of the first and second anchors is formed in a substantially columnar shape or a regular prism shape, and a structure for indirectly attaching each of the both ends of the spring member to the respective ones of the first and second anchors in mounting the heat sink body on the circuit board is a structure for attaching the respective attachment pieces to the attaching section of the respective anchor in an externally fit state.