To provide an alarm sound generation device capable of improving sound pressure.SOLUTION: An alarming horn 1 comprises a spiral pipe 15 which internally has a sound wave path 15a extending from a sound wave entrance part 15a1 to a sound wave path exit part 15a2, and a cover member 16 which has a reflection wall part 16a reflecting a sound wave from the sound wave path exit part 15a2. The cover member 16 comprises the reflection wall part 16a which faces an opening end part of the spiral pipe 15 forming the sound wave path exit part 15a2 at an interval, and then reflects the sound wave. The distance CH between the opening end part of the spiral pipe 15 and the reflection wall part 16a is set to a dimension within a range of ±10% of a value obtained by multiplying a quarter of a wavelength, based upon a fundamental frequency or multiplication frequency of an alarm sound, by an odd number.SELECTED DRAWING: Figure 2
【課題】音圧の向上が図れる警報音発生装置を提供する。【解決手段】車両用警音器1は、音波路入口部15a1から音波路出口部15a2まで延びる音波路15aを内部に有する渦巻き状管15と、音波路出口部15a2からの音波を反射する反射壁部16aを有するカバー部材16とを備える。カバー部材16は、音波路出口部15a2を形成する渦巻き状管15の開口端部に対して、離間して対向し音波を反射する反射壁部16aを備える。渦巻き状管15の開口端部と反射壁部16aとの距離CHは、警報音の基本周波数または逓倍周波数に基づいた波長の四分の一を奇数倍した値±10%の範囲に含まれる寸法に設定されている。【選択図】図2
ALARM SOUND GENERATION DEVICE
警報音発生装置
06.08.2020
Patent
Elektronische Ressource
Japanisch
IPC: | G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
ALARM SOUND GENERATING DEVICE AND ALARM SOUND GENERATING METHOD
Europäisches Patentamt | 2019
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