CN CN104696293B
The present invention relates to the variable bladeless fan of a kind of focusing, the annular fan head of the variable bladeless fan of this focusing includes outer shroud frame and inner ring lip；At the surface of described inner ring lip circumference all Strap pores；Focus adjusting mechanism includes focusing sheet, regulation ring and eccentric wheel；Each described focusing sheet runs through inner ring lip by bar shaped pore；Between described inner ring lip and outer shroud frame, at each bar shaped pore, it is respectively provided with an axis is perpendicular to the eccentric wheel on inner ring lip surface；The edge of each described eccentric wheel be close to its just to focusing sheet；Described regulation ring mates into slip ring by ring buckle and ring-shaped groove and is rotatably connected between inner ring lip and outer shroud frame；The anchor ring secure attachment pressing close to eccentric wheel at described regulation ring has sponge ring pad；Described sponge ring pad compresses each described eccentric wheel；This fan structure is simple, convenient to operate, it is possible to adjust focusing angle as required.
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