Abstract: A fan controlling circuit for detecting rotational speed of a fan, includes a comparison circuit and a controlling chipset. The comparison circuit receives a rotational speed signal from the fan at one input terminal, a reference voltage at another input terminal, and outputs a filtered rotational speed signal at an output terminal. The controlling chipset receives the filtered rotational speed signal, and outputs control signals to control the rotational speed of the fan.

Abstract: A computer enclosure includes a fan, a base and a cover. The base includes a support plate. The support plate defines a plurality of air vents. The fan is located on a bottom side of the support plate, and a plurality of operating components is mounted on a top side of the support plate. The cover is mounted on the top side of the support plate to enclose the plurality of operating components. The cover includes a top plate. The top plate defines a plurality of air vents cooperating with the air vents of the support plate to form an air flowing channel.

Abstract: A mounting mechanism for mounting a data storage device includes a drive bracket. The drive bracket includes two parallel side panels, each of which forms a pillar extending inwards toward each other. The data storage device includes two side walls capable of being received between two side panels of the drive bracket. Each of the side walls defines a groove therein. A surface of the corresponding groove is configured to match with the outer surface of the corresponding pillar so that the groove is capable of engaging with the pillar.

Abstract: A computer enclosure includes a chassis and a cover. The chassis has a first hole, and the cover has a second hole which is substantially coaxial with the first hole. A securing means engages in the first and second holes for mounting the cover on the chassis. A shield is fixed on one of the chassis and the cover. The shield defines a through hole communicating an outer side of the shield with the securing means and a receiving hole intersecting the through hole. A rotating block is rotatably positioned in the receiving hole between the through hole and the securing means. The rotating block includes a blocking portion configured to block the through hole. The rotating block defines an access hole in the blocking portion. The access hole is configured to communicate the through hole with the securing means by rotating the block to align the access hole with the securing means.

Abstract: A heat dissipating fan includes a housing (201), a stator (21), a rotor (27) and a buffer structure. The housing defines an accommodating space (202) and includes a hollow tube (201b). The tube encloses first and second bearings (22, 23) therein. The stator is arranged in the accommodating space and around the tube. The rotor has a shaft rotatably disposed in the first and the second bearings. The buffer structure includes at least a pair of magnets (25, 26) received in the tube and located between the first and second bearings. Repellent force is generated between the magnets, thereby preventing at least one of the first and the second bearing from being damaged by an accidental force acting thereon.

Abstract: The invention related to an electronic device enclosure that includes a chassis and a cover. The chassis includes a bottom wall, an opening and a circuit board mounted on the bottom wall. The cover is mounted on the chassis and is adapted to cover the opening of the chassis. A shock absorber is mounted on the cover and is resiliently resisted on the circuit board.

Abstract: A heat dissipating fan includes a housing (201), a stator (21), a rotor (27) and a buffer structure. The housing defines an accommodating space (202) and includes a hollow tube (201b). The tube encloses first and second bearings (22, 23) therein. The stator is arranged in the accommodating space and around the tube. The rotor has a shaft rotatably disposed in the first and the second bearings. The buffer structure includes at least a pair of magnets (25, 26) received in the tube and located between the first and second bearings. Repellent force is generated between the magnets, thereby preventing at least one of the first and the second bearing from being damaged by an accidental force acting thereon.

Abstract: A cooling fan includes a fan housing (10) having an upper tube (111) extending downwardly from a top side thereof and a lower tube (121) extending upwardly from a bottom side thereof, a ball bearing (20) being mounted in the upper tube, a sleeve bearing (30) being mounted in the lower tube, a stator (45) mounted around the lower tube, and a rotor (40). The rotor includes a hub (401) located between the ball bearing and the sleeve bearing and a shaft (50) extending through the hub. Two ends of the shaft are rotatably received in the ball bearing and the sleeve bearing, respectively.

Abstract: A heat dissipation fan includes a fan frame, a stator mounted to the frame, and a rotor rotatably disposed around the stator. The fan frame includes a bracket, a central tube for positioning the stator, and a supporting member. The supporting member is made of a material having a higher bending strength than a plastic material used to form the bracket and the central tube. The supporting member includes a main body connected to the central tube, a plurality of ribs extending radially outwardly from the main body, and a plurality of engaging units formed at free ends of the ribs, respectively. The engaging units are embedded in the bracket for integrally connecting the central tube to the bracket.

Abstract: A heat dissipation fan includes a fan frame, a stator mounted to the frame, and a rotor rotatably disposed around the stator. The fan frame includes a bracket, a central tube for positioning the stator, and a supporting member. The supporting member is made of a material having a higher bending strength than a plastic material used to form the bracket and the central tube. The supporting member includes a main body connected to the central tube, a plurality of ribs extending radially outwardly from the main body, and a plurality of engaging units formed at free ends of the ribs, respectively. The engaging units are embedded in the bracket for integrally connecting the central tube to the bracket.