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公开(公告)号：US20210237861A1
公开(公告)日：2021-08-05
申请号：US17049920
申请日：2019-04-16
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yonghun KANG , Junho PARK , Seunghwan JUNG , Soosang YANG , Sangjun JUNG
Abstract: An unmanned aerial vehicle according to the present invention may comprise: a rotor-blade for providing thrust according to generation of main stream; and a safety guard disposed to surround the rotor-blade. The safety guard may comprise: a guide member which is disposed coaxially with the rotor-blade while having a gap between the guard member and the end of the rotor-blade, so as to stabilize, when the rotor-blade rotates, a flow field suctioned by a negative pressure, and stably boost a discharge flow when the pressure is changed to a positive pressure; and a diffuser which is disposed coaxially with and radially spaced apart from the guide member, and generates a secondary flow toward the main stream to increase a flow rate.
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