To prevent a foreign matter from entering a sound path while preventing reduction in sound pressure by foreign matter entrance preventing means.SOLUTION: A horn 10 composed of three components of an acoustic part, a spiral case 200, and a cover is provided in which foreign matter preventing means is not formed on a sound path of the spiral case so as to prevent reduction in sound pressure. The cover has a cubic shape, and forms a communication port 310 on an upper surface, a bottom reflection wall on a bottom surface, and a rear reflection wall on a rear surface. A front surface forms a front passage port that is directed to a vehicle traveling direction and causes sound to pass therethrough, and front louvers. A side surface forms a side passage port that causes sound to pass therethrough, and side louvers 321. At least as to the side louvers, an intersection angle between a line connecting a leading end and a rear end of adjacent side louvers and a tangential line of the sound path of the spiral case is an obtuse angle at the lower side, so that an entered foreign matter is rebounded by the sound path and falls down. In addition, at least the front louvers are configured such that a line connecting a leading end and a rear end of adjacent front louvers stays in the cover, and is not directed to the spiral case.SELECTED DRAWING: Figure 13
【課題】異物侵入防止手段による音圧の低下を防ぎつつ、音道への異物の侵入を防止する。【解決手段】音響部、渦巻ケース200及びカバーの3部材からなるホーン10であって、異物防止手段を渦巻ケースの音道には形成せず音圧低下を防止する。カバーは、立方体形状をし、上面に連通口310、底面に底面反射壁、背面に背面反射壁を形成する。前面は、車両進行方向を向くと共に音響を通過させる前面通過口と前面ルーバを形成し、側面に音響を通過させる側面通過口と側面ルーバ321を形成する。少なくとも側面ルーバは、隣接する側面ルーバの先端及び後端を結ぶ線と渦巻ケースの音道の接線との交差角が下方側で鈍角として、侵入した異物は音道に跳ね返されて落下する。また、少なくとも前面ルーバは、隣接する前面ルーバの先端及び後端を結ぶ線がカバー内に留まり、渦巻ケースには向かわない構造とする。【選択図】図13
HORN
ホーン
2022-06-16
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 |