JP2010208557A - Vehicle existence notification device - Google Patents

Vehicle existence notification device Download PDF

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JP2010208557A
JP2010208557A JP2009058456A JP2009058456A JP2010208557A JP 2010208557 A JP2010208557 A JP 2010208557A JP 2009058456 A JP2009058456 A JP 2009058456A JP 2009058456 A JP2009058456 A JP 2009058456A JP 2010208557 A JP2010208557 A JP 2010208557A
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vehicle
speaker
notification device
presence notification
sound
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Japanese (ja)
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Toshiaki Nakayama
利明 中山
Hitoshi Tanaka
田中　　均
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Denso Corp
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Denso Corp
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Priority to JP2009058456A priority Critical patent/JP2010208557A/en
Priority to US12/720,252 priority patent/US20100231368A1/en
Priority to DE102010002700A priority patent/DE102010002700A1/en
Priority to CN201010136733A priority patent/CN101837757A/en
Publication of JP2010208557A publication Critical patent/JP2010208557A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle existence notification device 1 preventing any feeling of discomfort by the notification sound to a pedestrian or the like not at a dangerous position or a person in a cabin by transmitting the notification sound for notifying the existence of a vehicle 2 only to the pedestrian or the like to whom the danger must be notified. <P>SOLUTION: The vehicle existence notification device 1 has a modulation means 3 for modulating the ultrasonic wave according to the audible sound with the ultrasonic wave being a carrier wave, and a speaker 4 for generating the notification sound by emitting the modulated ultrasonic wave into the air. Thus, the modulated ultrasonic wave is modulated while advancing in the air, and converted into the audible sound. The modulated audible sound has excellent directivity similar to that of the ultrasonic wave, and the notification sound can be transmitted only to a pedestrian in a range to whom the danger must be notified. Thus, any feeling of discomfort by the notification sound is not given to a pedestrian or the like not at a dangerous position, or a person in a cabin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、車両の存在を、歩行者や自動車運転者など車両の外部の人に知らせるための車両存在報知装置に関する。   The present invention relates to a vehicle presence notification device for notifying a person outside a vehicle such as a pedestrian or a car driver of the presence of the vehicle.

従来より、電気自動車の走行時やハイブリッドカーのモータ駆動走行時に、車両が近づいていることを車両外の人に認識させるために、車両の外部にスピーカを設置して、そのスピーカから車両の存在を知らせる報知音（擬似エンジン音や擬似走行音等）を発生させる技術がある（特許文献１、２参照）。   Conventionally, a speaker has been installed outside the vehicle and the presence of the vehicle from the speaker in order to allow people outside the vehicle to recognize that the vehicle is approaching when driving an electric vehicle or driving a motor of a hybrid car. There is a technique for generating a notification sound (such as a pseudo engine sound or a pseudo running sound) that informs the user (see Patent Documents 1 and 2).

しかし、スピーカから発せられる音は周囲に拡散するため、危険位置にいない歩行者（例えば、前進走行中の後方にいる歩行者等）や車室内にいる人にまで報知音が聞こえてしまい、危険位置にいる歩行者以外にとっては不快感を与える。   However, since the sound emitted from the speaker diffuses to the surroundings, a warning sound is heard even by a pedestrian who is not in a dangerous position (for example, a pedestrian behind the vehicle while traveling forward) or a person in the passenger compartment. It is uncomfortable for non-pedestrians who are in a position.

特開２００６−１９９１１０号公報JP 2006-199110 A 特開平１０−２０１００１号公報Japanese Patent Laid-Open No. 10-201001

本発明は、上記の問題点を解決するためになされたものであり、その目的は、危険を知らせる必要のある歩行者等のみに車両の存在を知らせる報知音を伝えることにより、危険位置にいない歩行者等や車室内にいる人に対して報知音による不快感を与えないようにすることにある。   The present invention has been made in order to solve the above-mentioned problems, and its purpose is not to be in a dangerous position by transmitting a notification sound that informs the existence of a vehicle only to a pedestrian or the like that needs to inform the danger. The object is to prevent discomfort caused by the notification sound to pedestrians and people in the passenger compartment.

〔請求項１の手段〕
請求項１に記載の車両存在報知装置は、車両の存在を車両の外部に報知するものであって、超音波を搬送波とし、可聴音に応じて超音波を変調する変調手段と、変調された超音波を空中に放射することで報知音を発生させるスピーカとを備える。 [Means of Claim 1]
The vehicle presence notification device according to claim 1 is for reporting the presence of the vehicle to the outside of the vehicle, wherein the ultrasonic wave is used as a carrier wave, and the modulation means modulates the ultrasonic wave according to the audible sound. And a speaker that generates a notification sound by radiating ultrasonic waves into the air.

これによれば、変調された超音波が空中を進む内に復調されて可聴音となるが、この復調された可聴音は超音波と同様に指向性がよく、危険を知らせる必要のある範囲にいる歩行者のみに報知音を伝えることができ、危険位置にいない歩行者等や車室内にいる人に対して報知音による不快感を与えない。また、指向性がよいために、危険を知らせたい範囲には確実に音を伝えることができるので、小型のスピーカでも車両の存在を報知する機能を十分果たすことができる。
また、超音波は減衰しやすい性質をもつため、復調された可聴音も同様に減衰しやすく、車両から遠く離れた歩行者や他の車両にまで報知音が届くことがなく、騒音とならない。 According to this, the modulated ultrasonic wave is demodulated as it travels through the air to become an audible sound. However, the demodulated audible sound has good directivity like the ultrasonic wave, and is in a range where it is necessary to inform the danger. The notification sound can be transmitted only to the pedestrian who is present, and the discomfort caused by the notification sound is not given to the pedestrian who is not in the dangerous position or the person in the passenger compartment. In addition, since the directivity is good, sound can be reliably transmitted to a range where danger is to be notified, so that even a small speaker can sufficiently fulfill the function of notifying the presence of the vehicle.
In addition, since ultrasonic waves are easily attenuated, demodulated audible sounds are also easily attenuated, so that notification sounds do not reach pedestrians and other vehicles far from the vehicle, and no noise is generated.

〔請求項２の手段〕
請求項２に記載の車両存在報知装置によれば、スピーカは、車両の進行方向に向かって音波を放射するように設けられ、スピーカの前方には、多孔部材もしくは薄膜が配置される。 [Means of claim 2]
According to the vehicle presence notification device of the second aspect, the speaker is provided so as to emit sound waves toward the traveling direction of the vehicle, and a porous member or a thin film is disposed in front of the speaker.

これによれば、多孔部材もしくは薄膜により、音波の伝播を遮ることなく、走行風がスピーカ内に侵入するのを防ぐことができ、走行風中のダストからスピーカを保護することができる。   According to this, it is possible to prevent the traveling wind from entering the speaker without blocking the propagation of the sound wave by the porous member or the thin film, and to protect the speaker from the dust in the traveling wind.

〔請求項３の手段〕
請求項３に記載の車両存在報知装置によれば、スピーカは筐体内に設置され、スピーカの前方は、多孔部材もしくは薄膜により封鎖され、スピーカの前方以外は筐体により閉鎖されている。
これによれば、スピーカの前方以外を筐体により閉鎖することで、走行風によりスピーカを通過する空気の流れが発生するのを防ぐことができる。このため、スピーカに走行風の影響が及ぶことがなく、走行風中のダストからスピーカを保護することができる。 [Means of claim 3]
According to the vehicle presence notification device of the third aspect, the speaker is installed in the housing, the front of the speaker is sealed with the porous member or the thin film, and the portions other than the front of the speaker are closed with the housing.
According to this, it can prevent that the flow of the air which passes a speaker by driving | running | working wind generate | occur | produces by closing except a front of a speaker by a housing | casing. For this reason, there is no influence of traveling wind on the speaker, and the speaker can be protected from dust in the traveling wind.

〔請求項４の手段〕
請求項４に記載の車両存在報知装置によれば、スピーカからの音波の進路を屈曲させるための反射板を設け、反射板により、車両の進行方向に向かって音波を放射するようにした。
これによれば、走行風が直接当たらない位置にスピーカを配置しつつも、音の反射を利用して音波を所望の方向に向かって放射することができる。すなわち、スピーカの前方を多孔部材もしくは薄膜により覆わなくても、スピーカ前方を直接走行風にさらすことなく、走行風中のダストからスピーカを保護しつつ、音波を車両の進行方向に向かって放射することができる。 [Means of claim 4]
According to the vehicle presence notification device of the fourth aspect, the reflection plate for bending the course of the sound wave from the speaker is provided, and the reflection plate emits the sound wave toward the traveling direction of the vehicle.
According to this, it is possible to radiate sound waves in a desired direction using reflection of sound while arranging the speaker at a position where the traveling wind does not directly hit. That is, even if the front of the speaker is not covered with a porous member or a thin film, the front of the speaker is not directly exposed to the traveling wind, and the sound wave is emitted toward the traveling direction of the vehicle while protecting the speaker from the dust in the traveling wind. be able to.

〔請求項５の手段〕
請求項５に記載の車両存在報知装置によれば、車両の走行風が直接衝突する反射板に、水抜き及びダスト抜き用の穴が設けられている。
これによれば、走行風に混入する水やダストを穴から放出することができ、走行風中のダスト等が反射板に当たってスピーカに衝突することを防ぐことができる。尚、この穴は水抜き及びダスト抜き用の穴であり、音波の反射を妨げない位置及び大きさに設けられている。 [Means of claim 5]
According to the vehicle presence notification device of the fifth aspect, the holes for draining and dusting are provided in the reflecting plate on which the traveling wind of the vehicle directly collides.
According to this, water and dust mixed in the traveling wind can be discharged from the hole, and dust or the like in the traveling wind can be prevented from hitting the reflector and colliding with the speaker. This hole is a hole for draining water and dust, and is provided at a position and size that does not hinder the reflection of sound waves.

〔請求項６の手段〕
請求項６に記載の車両存在報知装置によれば、スピーカの前方に、音波の進路の周囲を囲む周壁が設けられている。
これによれば、周壁がメガホンの作用をするため、指向性がより高まるとともに、音が増幅されるので出力の小さなスピーカを使用することができる。 [Means of claim 6]
According to the vehicle presence notification apparatus of the sixth aspect, the peripheral wall surrounding the periphery of the course of the sound wave is provided in front of the speaker.
According to this, since the peripheral wall acts as a megaphone, the directivity is further enhanced and the sound is amplified, so that a speaker with a small output can be used.

〔請求項７の手段〕
請求項７に記載の車両存在報知装置によれば、スピーカは、車両のフロントグリルの隙間、もしくは、フロントグリルと車両のフードとの隙間を用いて配置され、フロントグリル、もしくは、フロントグリルとフードの双方が周壁の少なくとも一部をなす。
これによれば、フロントグリルやフードを周壁の一部とすることができるので、コストを削減することができる。 [Means of Claim 7]
According to the vehicle presence notification device according to claim 7, the speaker is arranged using a gap between the front grille of the vehicle or a gap between the front grille and the vehicle hood, and the front grille or the front grille and the hood are arranged. Both form at least part of the peripheral wall.
According to this, since the front grill and the hood can be a part of the peripheral wall, the cost can be reduced.

〔請求項８の手段〕
請求項８に記載の車両存在報知装置によれば、多孔部材は、ゴアテックスにより形成されている。
これによれば、防水効果が高まるので、スピーカへの水の浸入を防止することができる。 [Means of Claim 8]
According to the vehicle presence notification device of the eighth aspect, the porous member is formed of Gore-Tex.
According to this, since the waterproof effect is enhanced, it is possible to prevent water from entering the speaker.

〔請求項９の手段〕
請求項９に記載の車両存在報知装置によれば、薄膜は、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレンナフタレート（ＰＥＮ）により形成されている。
これによれば、薄膜の厚さが薄くても高い強度を確保することができるとともに、比較的低いコストで製造することができる。 [Means of Claim 9]
According to the vehicle presence notification apparatus of the ninth aspect, the thin film is formed of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).
According to this, even if the thickness of the thin film is thin, it is possible to ensure high strength and manufacture at a relatively low cost.

（ａ）は、車両存在報知装置の構成図であり、（ｂ）はスピーカの取付け状態を示す斜視図であり、（ｃ）はスピーカ付近の側面図である（実施例１）。(A) is a block diagram of a vehicle presence alerting | reporting apparatus, (b) is a perspective view which shows the attachment state of a speaker, (c) is a side view of a speaker vicinity (Example 1). 車両へのスピーカの取付け状態を示す斜視図である（実施例１）。(Example 1) which is a perspective view which shows the attachment state of the speaker to a vehicle. （ａ）〜（ｅ）は車両存在報知装置の可聴音放射原理を示す図である（実施例１）。(A)-(e) is a figure which shows the audible sound radiation | emission principle of a vehicle presence alerting | reporting apparatus (Example 1). スピーカ及び反射板を示す図である（実施例２）。(Example 2) which is a figure which shows a speaker and a reflecting plate.

本発明を実施するための形態１は、車両の存在を車両の外部に報知するものであって、超音波を搬送波とし、可聴音に応じて超音波を変調する変調手段と、変調された超音波を空中に放射することで報知音を発生させるスピーカとを備える。
また、スピーカは、車両の進行方向に向かって音波を放射するように設けられ、スピーカの前方には、多孔部材もしくは薄膜が配置される。そして、スピーカは筐体内に設置され、スピーカの前方は、多孔部材もしくは薄膜により封鎖され、スピーカの前方以外は筐体により閉鎖されている。 Embodiment 1 for carrying out the present invention is to notify the presence of a vehicle to the outside of the vehicle, using ultrasonic waves as a carrier wave, modulating means for modulating ultrasonic waves according to audible sound, and modulated ultrasonic waves A speaker that generates a notification sound by radiating sound waves into the air.
The speaker is provided so as to emit sound waves in the traveling direction of the vehicle, and a porous member or a thin film is disposed in front of the speaker. The speaker is installed in the housing, the front of the speaker is sealed with a porous member or a thin film, and the portions other than the front of the speaker are closed with the housing.

また、スピーカの前方に、音波の進路の周囲を囲む周壁が設けられる。そして、スピーカは、車両のフロントグリルの隙間、もしくは、フロントグリルと車両のフードとの隙間を用いて配置され、フロントグリル、もしくは、フロントグリルとフードの双方が周壁の少なくとも一部をなす。   In addition, a peripheral wall surrounding the periphery of the sound wave path is provided in front of the speaker. The speaker is arranged using a gap between the front grille of the vehicle or a gap between the front grille and the hood of the vehicle, and the front grille or both the front grille and the hood form at least a part of the peripheral wall.

本発明を実施するための形態２は、スピーカからの音波の進路を屈曲させるための反射板を設け、反射板により、車両の進行方向に向かって音波を放射するようにした。また、車両の走行風が直接衝突する反射板に、水抜き及びダスト抜き用の穴が設けられている。   In Embodiment 2 for carrying out the present invention, a reflecting plate for bending the course of the sound wave from the speaker is provided, and the sound wave is emitted toward the traveling direction of the vehicle by the reflecting plate. Further, a hole for draining water and removing dust is provided in a reflector plate that directly collides with the traveling wind of the vehicle.

〔実施例１の構成〕
実施例１の車両存在報知装置１の構成を、図１〜３を用いて説明する。
車両存在報知装置１は、例えば、電気自動車の走行時やハイブリッドカーのモータ駆動走行時に、車両２が近づいていることを車両２外の人に認識させるために、車両２の存在を知らせる報知音（擬似エンジン音や擬似走行音等）を発生させるものである。 [Configuration of Example 1]
The configuration of the vehicle presence notification device 1 according to the first embodiment will be described with reference to FIGS.
The vehicle presence notification device 1 is, for example, a notification sound that notifies the presence of the vehicle 2 so that a person outside the vehicle 2 can recognize that the vehicle 2 is approaching when the electric vehicle is traveling or the hybrid vehicle is driven by a motor. (Pseudo engine sound, simulated running sound, etc.) are generated.

車両存在報知装置１は、超音波を搬送波とし、可聴音に応じて超音波を変調する変調手段３と、変調された超音波を空中に放射することで報知音を発生させるスピーカ４と、変調手段３及びスピーカ４を通電制御するＥＣＵ５とを備える。   The vehicle presence notification device 1 includes an ultrasonic wave as a carrier wave, a modulation unit 3 that modulates the ultrasonic wave according to an audible sound, a speaker 4 that generates a notification sound by radiating the modulated ultrasonic wave in the air, and a modulation. And means 5 and ECU 5 for controlling energization of speaker 4.

また、ＥＣＵ５は、再生したい可聴音の可聴音波信号（図３（ａ）参照）を出力する可聴音波信号発生手段、搬送波信号である超音波信号（図３（ｂ）参照）を出力する超音波信号発生手段としての機能も有する。   The ECU 5 is an audible sound wave signal generating means for outputting an audible sound wave signal (see FIG. 3A) of an audible sound to be reproduced, and an ultrasonic wave outputting an ultrasonic signal (see FIG. 3B) which is a carrier wave signal. It also has a function as a signal generating means.

そして、ＥＣＵ５からの可聴音波信号及び超音波信号を変調手段３である変調／増幅回路へ入力し、変調手段３において、可聴音波信号に応じて超音波信号の振幅が変調される（図３（ｃ）参照）。変調／増幅回路は、変調回路と増幅回路とを有し、特に変調回路が変調手段３として機能する。
変調された超音波（被変調波）信号に基づいてスピーカ４の振動板８が振動することで、スピーカ４から被変調波が空気中に放射される。 Then, the audible sound wave signal and the ultrasonic signal from the ECU 5 are input to the modulation / amplification circuit which is the modulation means 3, and the modulation means 3 modulates the amplitude of the ultrasonic signal in accordance with the audible sound wave signal (FIG. 3 ( c)). The modulation / amplification circuit has a modulation circuit and an amplification circuit, and in particular, the modulation circuit functions as the modulation means 3.
As the diaphragm 8 of the speaker 4 vibrates based on the modulated ultrasonic wave (modulated wave) signal, the modulated wave is radiated from the speaker 4 into the air.

空気中に放射された被変調波は、空気中を進行するにつれて、空気の非線形特性により波形がひずみ（図３（ｄ）参照）、元の可聴音波信号に基づく可聴音（図３（ｅ）参照）が復調され、報知音として歩行者等に認識される。   As the modulated wave radiated into the air travels through the air, the waveform is distorted due to the non-linear characteristics of the air (see FIG. 3D), and the audible sound based on the original audible sound wave signal (FIG. 3E). Reference) is demodulated and recognized as a notification sound by a pedestrian or the like.

スピーカ４は、例えば、コーン状の振動板８を振動させることにより音を放射するコーン型ダイナミックスピーカであり、車両２の進行方向に向かって音波を放射するように、例えば、車両２の前進時に前方に向かって音波を放射できるように、車両２の前方に向かって設けられている（図１、２参照）。   The speaker 4 is, for example, a cone-type dynamic speaker that emits sound by vibrating the cone-shaped diaphragm 8. For example, when the vehicle 2 moves forward, the speaker 4 emits sound waves in the traveling direction of the vehicle 2. It is provided toward the front of the vehicle 2 so that sound waves can be emitted toward the front (see FIGS. 1 and 2).

スピーカ４の前方には、ゴアテックスにより形成された多孔部材９が配置されている。多孔部材９は、スピーカ４の前面を前方からの走行風から保護する大きさ及び位置に設けられている。
また、スピーカ４は筐体１０内に設置され、スピーカ４の前方は、多孔部材９より封鎖され、スピーカ４の前方以外、すなわち、スピーカ４の側方及び後方は筐体１０により閉鎖されている。 A porous member 9 formed by Gore-Tex is disposed in front of the speaker 4. The porous member 9 is provided in a size and position that protects the front surface of the speaker 4 from the traveling wind from the front.
The speaker 4 is installed in the housing 10, the front of the speaker 4 is sealed off by the porous member 9, and the sides other than the front of the speaker 4, that is, the side and rear of the speaker 4 are closed by the housing 10. .

また、スピーカ４の前方には、音波の進路の周囲を囲む周壁１１が設けられる。尚、スピーカ４は、車両２のフロントグリル１４の隙間１５を音波の進路として活用できるように配置されており（図２参照）、フロントグリル１４が周壁１１の少なくとも一部をなす。
前述の多孔部材９は、周壁１１の内周に固着されていてもよく（図１（ｂ）参照）、周壁１１の前方を覆うように固着されていてもよい（図１（ｃ）参照）。 Further, a front wall 11 surrounding the periphery of the sound wave path is provided in front of the speaker 4. The speaker 4 is arranged so that the gap 15 of the front grille 14 of the vehicle 2 can be used as a sound wave path (see FIG. 2), and the front grille 14 forms at least a part of the peripheral wall 11.
The porous member 9 described above may be fixed to the inner periphery of the peripheral wall 11 (see FIG. 1B), or may be fixed to cover the front of the peripheral wall 11 (see FIG. 1C). .

〔実施例１の効果〕
本実施例の車両存在報知装置１は、超音波を搬送波とし、可聴音に応じて超音波を変調する変調手段３と、変調された超音波を空中に放射することで報知音を発生させるスピーカ４とを備える。 [Effect of Example 1]
The vehicle presence notification device 1 of this embodiment includes an ultrasonic wave as a carrier wave, a modulation unit 3 that modulates the ultrasonic wave according to an audible sound, and a speaker that generates a notification sound by radiating the modulated ultrasonic wave in the air. 4.

これによれば、上述のように、変調された超音波が空中を進む内に復調されて可聴音となるが、この復調された可聴音は超音波と同様に指向性がよく、危険を知らせる必要のある範囲にいる歩行者のみに報知音を伝えることができる。   According to this, as described above, the modulated ultrasonic wave is demodulated as it travels through the air to become an audible sound, but this demodulated audible sound has good directivity as well as the ultrasonic wave and informs the danger. The notification sound can be transmitted only to pedestrians in a necessary range.

このため、危険位置にいない歩行者等や車室内にいる人に対して報知音による不快感を与えない。また、指向性がよいために、危険を知らせたい範囲には確実に音を伝えることができるので、小型のスピーカ４でも車両２の存在を報知する機能を十分果たすことができる。   For this reason, discomfort due to the notification sound is not given to a pedestrian or the like who is not in a dangerous position or a person in the passenger compartment. Further, since the directivity is good, it is possible to reliably transmit the sound to the range where the danger is to be notified, so that even the small speaker 4 can sufficiently fulfill the function of notifying the presence of the vehicle 2.

また、超音波は減衰しやすい性質をもつため、復調された可聴音も同様に減衰しやすく、車両から遠く離れた歩行者や他の車両２にまで報知音が届くことがないので、騒音とならない。   In addition, since ultrasonic waves tend to attenuate, the demodulated audible sound is also easily attenuated, and the notification sound does not reach pedestrians or other vehicles 2 far from the vehicle. Don't be.

また、スピーカ４は、車両２の進行方向に向かって音波を放射するように設けられ、スピーカ４の前方には、多孔部材９が配置される。   The speaker 4 is provided so as to emit sound waves in the traveling direction of the vehicle 2, and a porous member 9 is disposed in front of the speaker 4.

これによれば、多孔部材９により音波の伝播を遮ることなく、走行風がスピーカ内に侵入するのを防ぐことができ、走行風中のダストからスピーカ４を保護することができる。
また、多孔部材９は、ゴアテックスにより形成されているため、防水効果が高まり、スピーカ４への水の浸入を防止することができる。 According to this, the traveling wind can be prevented from entering the speaker without blocking the propagation of the sound wave by the porous member 9, and the speaker 4 can be protected from the dust in the traveling wind.
Further, since the porous member 9 is formed of Gore-Tex, the waterproof effect is enhanced and water can be prevented from entering the speaker 4.

さらに、本実施例の車両存在報知装置１では、スピーカ４は筐体１０内に設置され、スピーカ４の前方は、多孔部材９により封鎖され、スピーカ４の前方以外は筐体１０により閉鎖されている。
これによれば、スピーカ４の前方以外を筐体１０により閉鎖することで、走行風によりスピーカ４を通過する空気の流れが発生することを防ぐことができる。このため、スピーカ４に走行風の影響が及ぶことがなく、走行風中のダストからスピーカ４を保護することができる。 Furthermore, in the vehicle presence notification device 1 of the present embodiment, the speaker 4 is installed in the housing 10, the front of the speaker 4 is sealed by the porous member 9, and the portions other than the front of the speaker 4 are closed by the housing 10. Yes.
According to this, it can prevent that the flow of the air which passes the speaker 4 by driving | running | working wind generate | occur | produces by closing except the front of the speaker 4 with the housing | casing 10. FIG. For this reason, there is no influence of traveling wind on the speaker 4, and the speaker 4 can be protected from dust in the traveling wind.

また、スピーカ４の前方に、音波の進路の周囲を囲む周壁１１が設けられている。
これによれば、周壁１１がメガホンの作用をするため、指向性がより高まるとともに、音が増幅されるので出力の小さなスピーカ４を使用することができる。 In addition, a peripheral wall 11 is provided in front of the speaker 4 so as to surround the circumference of the sound wave path.
According to this, since the peripheral wall 11 acts as a megaphone, the directivity is further increased and the sound is amplified, so that the speaker 4 with a small output can be used.

さらに、本実施例では、スピーカ４は、車両２のフロントグリル１４の隙間１５を用いて配置され、フロントグリル１４が周壁１１の少なくとも一部をなすので、周壁１１を設けるためのコストを削減することができる。   Further, in the present embodiment, the speaker 4 is disposed using the gap 15 of the front grille 14 of the vehicle 2 and the front grille 14 forms at least a part of the peripheral wall 11, thereby reducing the cost for providing the peripheral wall 11. be able to.

〔実施例２の構成〕
実施例２の車両存在報知装置１の構成を、実施例１とは異なる点を中心に、図４を用いて説明する。
実施例２の車両存在報知装置１は、スピーカ４からの音波の進路を屈曲させるための反射板（以下に詳述する）を設け、反射板により、車両２の進行方向に向かって音波を放射するようにした。 [Configuration of Example 2]
The configuration of the vehicle presence notification device 1 according to the second embodiment will be described with reference to FIG. 4 with a focus on differences from the first embodiment.
The vehicle presence notification device 1 according to the second embodiment is provided with a reflection plate (described in detail below) for bending the course of sound waves from the speaker 4, and radiates sound waves toward the traveling direction of the vehicle 2 by the reflection plate. I tried to do it.

本実施例では、スピーカ４の前方に設けられる周壁１１が屈曲した管状を呈している。すなわち、周壁１１は、スピーカ４から真っ直ぐに進行する音波が臨界角（４５度）以下で入射する傾きを有する第１の反射板１８を有し、さらに、第１の反射板１８で反射した音波が臨界角（４５度）以下で入射する傾きを有する第２の反射板１９を有する。
このため、スピーカ４から放射される音波は、第１の反射板１８及び第２の反射板１９を介して、屈曲した管状内を進行して、車両２の進行方向に向かって放射される。 In the present embodiment, the peripheral wall 11 provided in front of the speaker 4 has a bent tubular shape. That is, the peripheral wall 11 includes a first reflector 18 having a slope at which a sound wave traveling straight from the speaker 4 is incident at a critical angle (45 degrees) or less, and further, a sound wave reflected by the first reflector 18. Has a second reflector 19 having an incident angle at a critical angle (45 degrees) or less.
For this reason, the sound wave radiated from the speaker 4 travels in the bent tubular shape via the first reflector 18 and the second reflector 19 and is radiated in the traveling direction of the vehicle 2.

これによれば、走行風が直接当たらない位置にスピーカ４を配置しつつも、音の反射を利用して音波を所望の方向に向かって放射することができる。すなわち、スピーカ４の前方を多孔部材９や薄膜により覆わなくても、スピーカ４前方を直接走行風にさらすことなく、走行風中のダストからスピーカ４を保護しつつ、音波を車両２の進行方向に向かって放射することができる。   According to this, it is possible to radiate sound waves in a desired direction using reflection of sound while arranging the speaker 4 at a position where the traveling wind does not directly hit. That is, even if the front of the speaker 4 is not covered with the porous member 9 or the thin film, the sound wave is transmitted in the traveling direction of the vehicle 2 while protecting the speaker 4 from dust in the traveling wind without directly exposing the front of the speaker 4 to the traveling wind. It can radiate toward.

また、車両の走行風が直接衝突する反射板（第２の反射板１９）に、水抜き及びダスト抜き用の穴２０が設けられている。尚、水抜き及びダスト抜き用の穴２０は、音波の反射を妨げない位置及び大きさに設けられている。
これによれば、走行風に混入する水やダストを穴から放出することができ、走行風中のダスト等が第２の反射板１９に当たって最終的にスピーカ４に到達するのを防ぐことができる。 Further, a hole 20 for draining water and removing dust is provided in the reflecting plate (second reflecting plate 19) directly colliding with the traveling wind of the vehicle. The draining and dust removing holes 20 are provided at positions and sizes that do not hinder the reflection of sound waves.
According to this, water and dust mixed in the traveling wind can be discharged from the hole, and dust or the like in the traveling wind can be prevented from hitting the second reflecting plate 19 and finally reaching the speaker 4. .

〔変形例〕
実施例１では、スピーカ４の前方に多孔部材９が配置されていたが、スピーカ４の前方に薄膜を配置してもよい。薄膜は振動によって音を伝達するので、薄膜を用いても、音波の伝播を遮ることなく、走行風がスピーカ４内に侵入するのを防ぐことができ、走行風中のダストからスピーカ４を保護することができる。
また、この薄膜は、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレンナフタレート（ＰＥＮ）により形成されていることが好ましい。これによれば、薄膜の厚さが薄くても高い強度を確保することができるとともに、比較的低いコストで製造することができるからである。 [Modification]
In the first embodiment, the porous member 9 is disposed in front of the speaker 4, but a thin film may be disposed in front of the speaker 4. Since the thin film transmits sound by vibration, even if the thin film is used, it is possible to prevent the traveling wind from entering the speaker 4 without blocking the propagation of the sound wave, and to protect the speaker 4 from dust in the traveling wind. can do.
The thin film is preferably formed of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). This is because even if the thickness of the thin film is thin, high strength can be ensured and it can be manufactured at a relatively low cost.

また、実施例１では、スピーカ４が車両２のフロントグリル１４の隙間１５を音波の進路として活用できるように配置されていたが、スピーカ４を車両２のフード２１（図１、２参照）とフロントグリル１４との間の隙間２２に配置し、フロントグリル１４とフード２１の双方が周壁１１の一部をなすようにしてもよい。   Further, in the first embodiment, the speaker 4 is arranged so that the gap 15 of the front grille 14 of the vehicle 2 can be used as a sound wave path, but the speaker 4 is connected to the hood 21 of the vehicle 2 (see FIGS. 1 and 2). It may be arranged in the gap 22 between the front grill 14 and both the front grill 14 and the hood 21 may form part of the peripheral wall 11.

また、実施例１、２の車両存在報知装置１において、筐体１０を前方に延出して周壁１１又は周壁１１の一部としてもよい。   Further, in the vehicle presence notification device 1 of the first and second embodiments, the housing 10 may be extended forward to be the peripheral wall 11 or a part of the peripheral wall 11.

また、実施例１、２のスピーカ４は、コーン型ダイナミックスピーカとして説明したが、スピーカ４はこの型に限られず、圧電型、コンデンサー型等でもよい。
また、実施例１、２では、報知音は、電気自動車の走行時やハイブリッドカーのモータ駆動走行時に車両２が近づいていることを車両２外の人に認識させるための擬似エンジン音や擬似走行音等として説明したが、報知音は電気自動車等に限らず用いられる車両２の存在を知らせる警笛音であってもよい。 Moreover, although the speaker 4 of Examples 1 and 2 was described as a cone type dynamic speaker, the speaker 4 is not limited to this type, and may be a piezoelectric type, a condenser type, or the like.
Further, in the first and second embodiments, the notification sound is a pseudo engine sound or pseudo driving for causing a person outside the vehicle 2 to recognize that the vehicle 2 is approaching when the electric vehicle is traveling or when the hybrid car is motor-driven. Although described as a sound or the like, the notification sound is not limited to an electric vehicle or the like, and may be a horn sound that notifies the presence of the vehicle 2 to be used.

１ 車両存在報知装置
２ 車両
３ 変調手段
４ スピーカ
９ 多孔部材
１０ 筐体
１１ 周壁
１４ フロントグリル
１５ 隙間
１８ 第１の反射板
１９ 第２の反射板
２０ 水抜き及びダスト抜き用の穴
２１ フード
２２ 隙間 DESCRIPTION OF SYMBOLS 1 Vehicle presence notification apparatus 2 Vehicle 3 Modulation means 4 Speaker 9 Porous member 10 Case 11 Perimeter wall 14 Front grille 15 Crevice 18 1st reflecting plate 19 2nd reflecting plate 20 Drain and dust removal hole 21 Hood 22 Gap

Claims (9)

車両の存在を車両の外部に報知する車両存在報知装置において、
超音波を搬送波とし、可聴音に応じて超音波を変調する変調手段と、
前記変調された超音波を空中に放射することで報知音を発生させるスピーカとを備えることを特徴とする車両存在報知装置。 In the vehicle presence notification device that notifies the outside of the vehicle of the presence of the vehicle,
Modulation means for modulating ultrasonic waves according to audible sound, with ultrasonic waves as carrier waves;
A vehicle presence notification device comprising: a speaker that generates a notification sound by radiating the modulated ultrasonic wave into the air. 請求項１に記載の車両存在報知装置において、
前記スピーカは、前記車両の進行方向に向かって音波を放射するように設けられ、
前記スピーカの前方には、多孔部材もしくは薄膜が配置されることを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 1,
The speaker is provided to emit a sound wave toward the traveling direction of the vehicle,
A vehicle presence notification device, wherein a porous member or a thin film is disposed in front of the speaker. 請求項２に記載の車両存在報知装置において、
前記スピーカは筐体内に設置され、前記スピーカの前方は、前記多孔部材もしくは薄膜により封鎖され、前記スピーカの前方以外は筐体により閉鎖されていることを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 2,
The vehicle presence notification device, wherein the speaker is installed in a housing, the front of the speaker is sealed by the porous member or a thin film, and the portions other than the front of the speaker are closed by the housing. 請求項１に記載の車両存在報知装置において、
前記スピーカからの音波の進路を屈曲させるための反射板を設け、
該反射板により、前記車両の進行方向に向かって音波を放射するようにしたことを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 1,
Providing a reflector for bending the course of sound waves from the speaker;
A vehicle presence notification device characterized in that sound waves are radiated in the traveling direction of the vehicle by the reflecting plate. 請求項４に記載の車両存在報知装置において、
前記車両の走行風が直接衝突する前記反射板に、水抜き及びダスト抜き用の穴が設けられていることを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 4,
A vehicle presence notification device, wherein a hole for draining water and removing dust is provided in the reflecting plate directly colliding with traveling wind of the vehicle. 請求項１〜５のいずれか１項に記載の車両存在報知装置において、
前記スピーカの前方に、音波の進路の周囲を囲む周壁が設けられていることを特徴とする車両存在報知装置。 In the vehicle presence notification device according to any one of claims 1 to 5,
A vehicle presence notification device, characterized in that a peripheral wall surrounding the periphery of a sound wave path is provided in front of the speaker. 請求項６に記載の車両存在報知装置において、
前記スピーカは、前記車両のフロントグリルの隙間、もしくは、前記フロントグリルと前記車両のフードとの隙間を用いて配置され、
前記フロントグリル、もしくは、前記フロントグリルと前記フードの双方が前記周壁の少なくとも一部をなすことを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 6,
The speaker is arranged using a gap between the front grille of the vehicle or a gap between the front grille and the vehicle hood,
The vehicle presence notification device, wherein the front grill or both the front grill and the hood form at least a part of the peripheral wall. 請求項２または３に記載の車両存在報知装置において、
前記多孔部材は、ゴアテックスにより形成されていることを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 2 or 3,
The vehicle presence notification device, wherein the porous member is formed of Gore-Tex. 請求項２または３に記載の車両存在報知装置において、
前記薄膜は、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレンナフタレート（ＰＥＮ）により形成されていることを特徴とする車両存在報知装置。 The vehicle presence notification device according to claim 2 or 3,
The vehicle presence notification device, wherein the thin film is made of polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).
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