Abstract: A base structure of a cooling fan and a manufacturing method of the base structure are provided. The base structure includes a bearing, a shaft sleeve and a base. The bearing defines therein a first cylindrical cavity for receiving a shaft of the cooling fan. The shaft sleeve is made of a first material and defines therein a second cylindrical cavity. The shaft sleeve includes a protrusion part and a first engagement structure arranged at a first end and a second end of the shaft sleeve, respectively. The base is made of a second material and includes a second engagement structure. The second engagement structure is interlocked with the first engagement structure since the second engagement structure is integrally formed with the base. The first material has a greater rigidity than the second material.

Abstract: A fan dynamic pressure structure having a plastic frame integrally formed around an oil-containing sintered metal powder bearing includes an oil-containing sintered metal powder bearing, a plastic frame having a middle tube integrally formed around a peripheral of a bushing body of the oil-containing sintered metal powder bearing, a blade assembly having an axial shaft penetrating through a shaft hole of the oil-containing sintered metal powder bearing, the axial shaft protruding downwardly and having an annular groove, and an annular dynamic pressure piece having an insertion hole and an annular body surrounding the insertion hole. The insertion hole is engaged with the annular groove of the fan assembly, the annular body has a plurality of curved radial dynamic pressure ditches on a surface adjacent to the oil-containing sintered metal powder bearing, of the annular body.

Abstract: A fan dynamic pressure structure having a plastic frame integrally formed around an oil-containing sintered metal powder bearing includes an oil-containing sintered metal powder bearing, a plastic frame having a middle tube integrally formed around a peripheral of a bushing body of the oil-containing sintered metal powder bearing, a blade assembly having an axial shaft penetrating through a shaft hole of the oil-containing sintered metal powder bearing, the axial shaft protruding downwardly and having an annular groove, and an annular dynamic pressure piece having an insertion hole and an annular body surrounding the insertion hole. The insertion hole is engaged with the annular groove of the fan assembly, the annular body has a plurality of curved radial dynamic pressure ditches on a surface adjacent to the oil-containing sintered metal powder bearing, of the annular body.

Abstract: An integral structure of a slim fan frame includes a metal baseplate, a bearing, a central plastic tube and a plastic flow passage sidewall which are connected to each other by integral forming. The method of manufacturing the integral structure is to simultaneously integrate the central plastic tube, the plastic flow passage sidewall, the metal baseplate and the bearing while injection molding the central plastic tube and the plastic flow passage sidewall.

Abstract: An integral structure of a slim fan frame includes a metal baseplate, a bearing, a central plastic tube and a plastic flow passage sidewall which are connected to each other by integral forming. The method of manufacturing the integral structure is to simultaneously integrate the central plastic tube, the plastic flow passage sidewall, the metal baseplate and the bearing while injection molding the central plastic tube and the plastic flow passage sidewall.

Abstract: A fastener structure for securing multiple fans includes an assembly hole, a fastening pillar, and an adhesive layer. The assembly hole is located in a frame of a first fan. The fastening pillar is located on a frame of a second fan, wherein the configuration of the fastening pillar is suited to be inserted into the assembly hole. The adhesive layer is located between an outer wall of the fastening pillar and an inner wall of the assembly hole when the fastening pillar is inserted into the assembly hole.

Abstract: An integrally molded plastic fan motor frame and sintered oil-impregnated bearing structure includes a plastic fan motor frame and a sintered oil-impregnated bearing integrally enclosed in a central tube of the frame, so that the integrally molded structure is solid and precise. In a method of manufacturing an integrally molded plastic fan motor frame and sintered oil-impregnated bearing structure, a sintered oil-impregnated bearing is prepared and disposed in a mold that is used to integrally form a plastic fan motor frame through injection molding, so that the sintered oil-impregnated bearing is integrally received in a central tube of the plastic fan motor frame when the latter is integrally molded. The integrally molded plastic fan motor frame and sintered oil-impregnated bearing structure is solid and can be easily manufactured at high precision to avoid deformation of the bearing due to compression in press-fitting as in the prior art.

Abstract: An extendible rod locking sleeve structure consisting of a U-shaped seating sleeve having a small and a large facing annular opening and, furthermore, a bolt or an eccentric lever perpendicularly disposed at the back side of the center section capable of reversible forward engagement by thread fastening or an articulated thrusting motion such that both the inner rod and the outer rod comprising an extendible rod inserted through the two annular openings become fully locked down at the upper and lower positions of the ensleeved area.