Acoustic-signal emitting device for vehicles

B - Operations – Transporting – 06 – B

Patent

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B06B 1/02 (2006.01) B60R 25/10 (2006.01) G08B 3/10 (2006.01) G10K 15/02 (2006.01)

Patent

CA 2488603

An acoustic-signal emitting device for vehicles comprises an electronic control circuit (50) for generating driving signals and a loudspeaker (LDSK). The loudspeaker includes: a transducer device (1) connected electrically to the electronic control circuit (50) in order to receive the driving signals and to convert them into acoustic radiation, the transducer device (1) being a moving-coil device with a compression chamber and having dimensions such that it can generate acoustic radiation characteristic of an alarm siren in a first operative condition and acoustic radiation characteristic of an acoustic warning device in a second operative condition; and a twisted horn (2) coupled acoustically with the transducer device (1) in order to propagate the acoustic radiation emitted in the two operative conditions, outside the emitting device (100).

La présente invention concerne un dispositif d'émission de signal acoustique pour véhicules comprenant un circuit électronique de commande (50) qui sert à produire des signaux de commande, et un haut-parleur (LDSK). Le haut-parleur comprend: un dispositif transducteur (1) connecté électriquement au circuit électronique de commande (50) pour recevoir les signaux de commande et les convertir en rayonnement acoustique, le dispositif transducteur (1) étant un dispositif à bobine mobile qui présente une chambre de compression, et ayant des dimensions qui lui permettent de produire un rayonnement acoustique caractéristique qu'une sirène d'alarme dans un premier mode de fonctionnement, et un rayonnement caractéristique d'un dispositif d'avertissement sonore dans un second mode de fonctionnement; et une trompe spiralée (2) couplée du point de vue acoustique au dispositif transducteur (1) afin de faire se propager le rayonnement acoustique émis dans les deux modes de fonctionnement, vers l'extérieur du dispositif d'émission (100).

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