Title:
Electronic equipment and image forming equipment
Document Type and Number:
Japanese Patent JP6344672
Kind Code:
B2
Abstract:
A sound absorbing device including a Helmholtz resonator having a projection part which includes a shape of protruding from an outer wall surface of a communicating part forming plate among the communicating part forming plate and a cavity forming member that are cavity part forming members forming a cavity part of the Helmholtz resonator, and surrounding an opening of a communicating part that causes the cavity part to communicate with the outside.
Inventors:
Hirota Hirakawa
Junichi Murano
Shintaro Asanuma
Saihiro Shimada
Takeshi Endo
Hiroki Ishimitsu
Masahiro Ishida
Naoki Matsuda
Junichi Murano
Shintaro Asanuma
Saihiro Shimada
Takeshi Endo
Hiroki Ishimitsu
Masahiro Ishida
Naoki Matsuda
Application Number:
JP2017092181A
Publication Date:
June 20, 2018
Filing Date:
May 08, 2017
Export Citation:
Assignee:
株式会社リコー
International Classes:
G10K11/172; G03G21/00; G03G21/16; H05K5/02
Domestic Patent References:
| JP2013254881A | ||||
| JP2008273353A | ||||
| JP200412881A | ||||
| JP2010217664A |
Foreign References:
| WO2012145141A1 |
Attorney, Agent or Firm:
Toshi Kuroda