Abstract: A fan includes a casing having a bottom wall and a shaft mounted inside the casing for rotatably supporting a rotary blade assembly comprised of blades inside the casing and above the bottom wall with the blade assembly being axially movable with respect to the shaft. A levitation device includes magnets mounted to the blades of the blade assembly and a magnetic field generator mounted in the bottom wall and opposing the magnets of the blades. The magnet field generator is controlled by a control circuit to selectively generate a magnetic field that interacts with the magnets of the blades to induce expelling force acting upon the blade assembly to axially move the blade assembly a predetermined distance away from the bottom wall. The magnitude of the expelling force can be changed by controlling the magnetic field generator whereby the distance between the blades and the bottom wall can be adjusted.

Abstract: A power supply device disposed in an electronic device having a main power supply includes a voltage converting unit for converting the voltage from the main power supply, a power controlling unit for controlling the current from the converting unit, and a USB interface unit for providing the electric power from the main power supply to peripheral units.

Abstract: A switch assembly for a laptop computer includes a push member connected to the lid of the computer. An activation member is disposed to a base of the computer. A switch is located at a position where the activation member movably touches the switch when the lid is pivoted toward the base and the activation member is moved by a movement of the push member.

Abstract: A hinge connects a screen to a master body of a notebook computer. The hinge includes a vertical pivot shaft mounted to a screen and a first connecting pivot seat through a plurality of springs and the corresponding nuts thereof, which enables the screen to pivot around the vertical pivot shaft relative to the master body; a first connecting pivot seat mounted to the vertical pivot shaft and a horizontal pivot shaft; a horizontal pivot shaft mounted to the first connecting pivot seat and a second connecting pivot seat, comprising an outer sleeve and an inner pivot shaft that enables the screen to pivot in horizontal relative to the master body; and a second connecting pivot seat mounted to the horizontal pivot shaft and the master body.

Abstract: A fan includes a casing having a bottom wall and a shaft mounted inside the casing for rotatably supporting a rotary blade assembly comprised of blades inside the casing and above the bottom wall with the blade assembly being axially movable with respect to the shaft. A levitation device includes magnets mounted to the blades of the blade assembly and a magnetic field generator mounted in the bottom wall and opposing the magnets of the blades. The magnet field generator is controlled by a control circuit to selectively generate a magnetic field that interacts with the magnets of the blades to induce expelling force acting upon the blade assembly to axially move the blade assembly a predetermined distance away from the bottom wall. The magnitude of the expelling force can be changed by controlling the magnetic field generator whereby the distance between the blades and the bottom wall can be adjusted.

Abstract: A heat dissipation fan having a side mount configuration includes a casing having a bottom wall and a surrounding side wall extending from the bottom wall to define an open top. The side wall also defines a side opening to guide an air flow toward a heat source. A cross bar is detachably mounted to the open top or is made of resilient material. A shaft is arranged inside the casing and has upper and lower ends removably received in a recess defined in the cross bar and a notch defined in the bottom wall of the casing. A blade assembly comprised of a cylinder and blades extending from the cylinder is rotatably mounted to the shaft. Windings and magnets are arranged inside the cylinder. Electrical wires are electrically connected to the windings via conductive pads formed on the upper end of the shaft or by extending through openings defined in the upper end of the shaft.

Abstract: A heat dissipation fan having a side mount configuration includes a casing having a bottom wall and a surrounding side wall extending from the bottom wall to define an open top. The side wall also defines a side opening to guide an air flow toward a heat source. A cross bar is detachably mounted to the open top or is made of resilient material. A shaft is arranged inside the casing and has upper and lower ends removably received in a recess defined in the cross bar and a notch defined in the bottom wall of the casing. A blade assembly comprised of a cylinder and blades extending from the cylinder is rotatably mounted to the shaft. Windings and magnets are arranged inside the cylinder. Electrical wires are electrically connected to the windings via conductive pads formed on the upper end of the shaft or by extending through openings defined in the upper end of the shaft.