Abstract: A positioning structure includes a first bush, a positioning washer, a bolt, and a button. The first bush has a first and a second opening. The positioning washer is fixed in the first bush, and includes a positioning hole aligned to the first opening and multiple positioning elastic pieces circumferentially arranged in the positioning hole. The bolt is adapted to be inserted into the first bush from the first opening and passes through the positioning hole. At least one of the positioning elastic pieces is engaged with a thread of the bolt. The button is inserted into the first bush from the second opening and contacts the positioning elastic pieces. The button is adapted to slide toward the first opening to push the positioning elastic pieces to deform, so that the positioning elastic pieces are separated from the thread, and the bolt is loosened from the positioning washer.

Abstract: A system is provided for installing a heatsink onto a circuit board. The heatsink has a base, a first hook and a second hook. The system includes a heatsink holder, a circuit board arm, a heatsink pusher, and a hook pusher. The heatsink holder is operable to receive the heatsink. The circuit board arm is operable to move the circuit board onto the heatsink received on the heatsink holder such that the bottom surface of the heatsink is adjacent to the circuit board. The heatsink pusher is operable to move the heatsink holder in a first direction so as to move the first hook relative to the first catch. The hook pusher is operable to push the first hook in a direction normal to the base from the top surface to the bottom surface.

Abstract: A system is provided for installing a heatsink onto a circuit board. The heatsink has a base, a first hook and a second hook. The system includes a heatsink holder, a circuit board arm, a heatsink pusher, and a hook pusher. The heatsink holder is operable to receive the heatsink. The circuit board arm is operable to move the circuit board onto the heatsink received on the heatsink holder such that the bottom surface of the heatsink is adjacent to the circuit board. The heatsink pusher is operable to move the heatsink holder in a first direction so as to move the first hook relative to the first catch. The hook pusher is operable to push the first hook in a direction normal to the base from the top surface to the bottom surface.