Title:
MULTICOPTER AND MUFFLING DEVICE
Document Type and Number:
Japanese Patent JP2020040511
Kind Code:
A
Abstract:
To provide a technology for reducing noises of a drone.SOLUTION: In a drone 1, a muffling unit 50, which assumes such a shape as to cover a periphery around it, is attached to each rotary vane 20 by a predetermined an attachment structure. The muffling unit 50 comprises an annular frame 51, attachment openings 55 of through-holes, which are formed at regular intervals in a circumferential direction in the frame 51, and a resonator 53 that is provided on the outer peripheral side of each attachment opening 55. The resonator 53, which is a helmholtz resonator, muffles noises generated by the rotary vane 20.SELECTED DRAWING: Figure 1
Inventors:
SHE JINHUA
WATANABE YOSHIJIRO
NAKANO MITSUO
SAMARATHUNGA WASANTHA
ICHIYANAGI KEN
OTANI ATSUSHI
ANDO HIROSHI
ARAI HIDEOMI
WATANABE YOSHIJIRO
NAKANO MITSUO
SAMARATHUNGA WASANTHA
ICHIYANAGI KEN
OTANI ATSUSHI
ANDO HIROSHI
ARAI HIDEOMI
Application Number:
JP2018169248A
Publication Date:
March 19, 2020
Filing Date:
September 10, 2018
Export Citation:
Assignee:
KIKUCHI SEISAKUSHO CO LTD
International Classes:
B64D33/00; B64C27/08; B64C39/02; G10K11/16; G10K11/172
Attorney, Agent or Firm:
Yukio Sakamoto