Title:
HORN DEVICE
Document Type and Number:
Japanese Patent JP2016057585
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suppress variation in acoustic property by smoothing the air flow during vibration of a diaphragm.SOLUTION: An inclined plane 37c of a washer 37 forming an air flow channel 50 is set as an inclined plane whose diameter dimension gradually decreases as the inclined plane moves away from a diaphragm 35 in the axial direction of a movable iron core 36. Therefore, the flow of the air flowing through the air flow channel 50 can be smoothed compared with a staircase-shape air flow channel having a conventional vertical plane. Therefore, turbulence hardly occurs in the flow of the air flowing through the air flow channel 50, and variation in the acoustic property of a horn device 10 can be suppressed.SELECTED DRAWING: Figure 3
Inventors:
KOBAYASHI YOSHIKAZU
YOKOYAMA HIROSHI
MATSUKURA RYOTA
YOKOYAMA HIROSHI
MATSUKURA RYOTA
Application Number:
JP2014186478A
Publication Date:
April 21, 2016
Filing Date:
September 12, 2014
Export Citation:
Assignee:
MITSUBA CORP
International Classes:
G10K9/15; G10K9/12
Domestic Patent References:
| JPH11143475A | 1999-05-28 | |||
| JPS57157297A | 1982-09-28 | |||
| JP3186524U | 2013-10-10 | |||
| JPH11143475A | 1999-05-28 | |||
| JPS57157297A | 1982-09-28 | |||
| JP3186524U | 2013-10-10 | |||
| JP2013097126A | 2013-05-20 | |||
| JP5058912B2 | 2012-10-24 |
Foreign References:
| US4361952A | 1982-12-07 | |||
| US2227289A | 1940-12-31 | |||
| WO1998052170A1 | 1998-11-19 |
Attorney, Agent or Firm:
Yamato Tsutsui
Yoshitaka Kozuka
Akiko Tsutsui
Yoshitaka Kozuka
Akiko Tsutsui