Patent ID: 7280361
Filing Date: 2007-10-09
Classification: H01L,Y10T

Abstract:
1. A clamping tool for securing a heat sink to a holding frame, which is disposed on top of a central processing unit (CPU), comprising: a support arm, providing a horizontal arm member with a first end and a second end and an elastic vertical arm member being attached to the second end with a lower hook end thereof engaging with a lock hole disposed at a lateral side of the holding frame and the first end having a first slot; a press handle, providing an elongated main part, which has a rib part extending laterally from almost a half section of the periphery thereof, an end of the main part being flat for being stirred easily, another end of the main part having a round projection next to the rib with an elongated opening between the round projection and the rib and the projection having an eccentric pivotal hole; an elastic member, being a bow shaped plate, being disposed below the first end of the horizontal arm member with a second slot aligning with the first slot; and an engaging arm; having an upper end with a pivotal hole and a lower bent end, the upper end passing through the second and first slots and pivotally fitting with the press handle by way of a pivotal shaft passing through the pivotal hole and the eccentric pivotal hole, and the lower bent end engaging with another lock hole at another lateral side of the holding frame; whereby, the press handle is stirred, the heat sink is capable of being clamped against the CPU due to the elastic member providing a capability to bias the engaging arm toward the holding frame.