Locking mechanism and server having the same

A server having a locking mechanism, comprising:

• a slide rail assembly assembled to a rack, the slide rail assembly including an outer slide rail and an inner slide rail slidable with respect to the outer slide rail;
• a chassis, the chassis being fixed to one side of the inner slide rail and movable with the inner slide rail;
• and
• a locking structure, the locking structure being fastened to a positioning hole of a rack and fixed to the inner slide rail, the locking structure including a housing, a handle pivotally rotatable with respect to the housing, a hook element movable in association with the handle, and a resilient element for restoring the hook element to an initial position, wherein when the handle is rotated to drive the hook element to be detached from the positioning hole, the chassis is released and movable with respect to the rack,
• wherein the handle includes a first pivot portion pivotally connected to the housing and a pivot block protruding from the first pivot portion, and the hook element includes a second pivot portion pivotally connected to the housing and includes a hook portion and a push portion connected to the second pivot portion at its two sides;
• wherein a length from the second pivot portion to the push portion is larger than a length from the first pivot portion to the pivot block, and an axis of the first pivot portion and an axis of the second pivot portion are not on the same horizontal plane.